|First appearance||X.A.N.A. Awakens (chronologically)|
|English voice actor(s)||David Gasman|
|"A super dangerous program, like a virus, which can control electricity. And it activates towers on Lyoko to gain access to your world."|
–Aelita about the malevolent artificial intelligence in "X.A.N.A. Awakens, Part 2"
X.A.N.A. (or simply XANA) is the main antagonist of the entire Code Lyoko series. It is a malevolent computer program that inhabits the Supercomputer which runs Lyoko. It wants to take over all of humanity, and eliminate its main obstacles, the Lyoko Warriors.
After its supposed destruction, XANA managed to miraculously revive through the unknown Cortex Replika, becoming even stronger than before in Code Lyoko: Evolution.
XANA is an entity that is without a physical form. The pulsating energies that flow in the Lyoko Wires are the only sign of its presence in the system. Its spectres are the closest to a true form, but they are merely parts of itself controlled by it in the end.
Its only real incarnation was in Ghost Channel, where it manifested into a demonic caricature of Jeremie. However, the closest to a real appearance was in Fight to the Finish. When XANA was being wiped out by the multi-agent program, the spectre that possessed William emerged as a large, ghostly being, screaming in agony before it vaporizes.
XANA is a self-aware and dangerous program that acts through Lyoko to infect networks and possess objects like a virus for attacks on humanity, seeking total domination over them. It also devises schemes to eliminate any obstacles, and tries to protect and ensure its own survival.
XANA acts with calculating accuracy, and has basic knowledge about humans. In the first two seasons, it gradually evolves in strength, intelligence, and personality. But, XANA would still be a simple program that can only understand theoretical knowledge, incapable of going beyond logical patterns, and can never fully grasp love, friendship, or risking everything to win battles as humans do, making it far from perfect. XANA also never retries the exact same plan after it fails.
XANA can't display any expressions inside the computer system, but shows itself to be a demonic and hostile entity. As the series progresses, it will also display arrogance, have no regard for others, fear its most dangerous obstacles, and can show respect to its enemies.
XANA classifies all of the Lyoko Warriors as obstacles to be eliminated. However, XANA has displayed its own opinions about individual team members.
- Jeremie Belpois: XANA targets Jeremie the most, because only he can use the lab computer, and it believes that he is the reason they succeed so much. XANA also respects his extremely high intelligence, saying it was "almost proud to resemble him" when it created a spectre with his appearance.
- Aelita: It sees her as both a dangerous obstacle, and a valuable tool to use. Aelita is the only one that can deactivate its Towers, and nearly as good with computers as Jeremie. However, XANA usually needs her to accomplish its new strategies throughout the series.
- Yumi Ishiyama: XANA always tries to attack her the most out of the three warriors, and uses her for most of its schemes. It sees that she is the most mature one, and is aware of her fighting skill.
- Odd Della Robbia: XANA just sees Odd as another annoyance. But, it has shown to respect him enough to have its monsters listen to his attack orders in Marabounta.
- Ulrich Stern: It is aware that Ulrich is their best fighter, and usually fights him by outnumbering him.
- William Dunbar: XANA possessed William on his first mission, and used him as its minion throughout the fourth season, because he had the most strength and potential out of the warriors, and wanted that power for itself. Even after he was freed, XANA has tried to manipulate him into coming back to its side in Evolution.
- Laura Gauthier: Evolution only. XANA was less focused on her because the rest don't trust her.
- Eva Skinner: In the Chronicles novel series, Eva joined their group of friends, but was really XANA's possessed pawn in order to destroy the group from within.
XANA has a deep hatred and fear of Franz Hopper, because he is its creator, and holds knowledge of how to destroy it for good. When he escaped into the network, XANA has tried hard to lure him out and destroy him once and for all.
XANA and Lyoko were both created by a computer genius named Waldo Franz Schaeffer. He created it to destroy Project Carthage, a military project designed to disrupt enemy communications. XANA eventually became self-aware and betrayed him. It seized control the Supercomputer and made him and his daughter prisoners on Lyoko. Franz Hopper shut off the Supercomputer to stop XANA from bringing harm to the world and trapped it there.
XANA was reawakened in the prequel episode by Jeremie, who reactivates the Supercomputer, and discovers Aelita, Lyoko, and deadly monsters that roam through the sectors. Suddenly, it activates a Tower in the Ice Sector. Through the red Tower, XANA generates electric shocks from machines, and controls machines and wires, then it unleashes a ghost made of electricity into the real world to go after the ones who know about the Supercomputer. Jeremie virtualizes Odd Della Robbia, Ulrich Stern, and Yumi Ishiyama onto Lyoko to fight the monsters, and ensure Aelita gets to the red Tower, and she deactivates it. They discover that the dangerous attacks and monsters were the work of XANA, an evil computer program that can control electricity, and activates Towers to gain access to the real world.
Season OneXANA is simple-minded in the first season. It activates Towers to constantly launch random attacks against the city and the group, and sends monsters on Lyoko to get rid of Aelita, the only person who can deactivate its Towers.
Its next attack is in Teddygozilla, which involves possessing Milly's teddy bear to attack human beings. It increases to giant size and goes after the group. On Lyoko, Odd gets Aelita past the monsters, deactivates the Tower, and a return to the past erases the damage caused.
XANA attempts nuclear sabotage in Seeing Is Believing. It creates power failures all over the city to steal electricity from the city's substations, then unleash all of power on the nuclear plant, creating a short-circuit that would cause a nuclear explosion and wipe out the whole region. On Lyoko, XANA hides the Tower's path under the illusion of an oasis in the Desert.
In Holiday in the Fog, XANA knocks over containers filled with toxic substances, and turns it into living clouds of gas, which it spreads from the school to all over the city.
XANA possesses the bus that Ulrich and Odd ride in Log Book. It tries to speed the bus toward the petrochemical plant, threatening to blow up a portion of the city. On Lyoko, XANA uses a sandstorm to cloud the group's vision, and causes the ground to split apart to try to make them fall.
It infects the country's digital infrastructure with a virus in Big Bug. This causes minor problems with electronic systems, but its real goal is to cause an freight train carrying deadly toxins get placed on the same track with another train. If they collide, the toxins will be released, creating an ecological disaster on the city.
In Cruel Dilemma, XANA goes for a more direct approach, by possessing two bulldozers and using them to try and demolish the Factory. Its aim is to wreck the computer interface and the Scanners, meaning no more communication with Aelita, or transfers to Lyoko.
XANA tries an infiltration tactic for the first time in Image Problem. It lures Aelita and Yumi to an active, unguarded Tower, captures Yumi with a Guardian, and fools them into thinking she was devirtualized. With the Tower, XANA has really materialized a clone of her into the real world. The evil clone causes trouble with them, and convinces them to go to Lyoko. Inside the Scanner room, the fake Yumi tries to unplug the Scanners to leave them with no way to return. The others free Yumi and she fights the clone, while the others deactivate the Tower.
The next attack in End of Take involves taking over an animatronic alien meant for a movie, and send it to hunt down the group. On Lyoko, XANA creates a fake Tower next to the real one to confuse Aelita.
In Satellite, XANA tries to use the school's phone antenna to access satellites in orbit. It gains control of a military satellite armed with a powerful laser. It tries to use it to destroy its enemies at the school.
XANA captures Aelita with a Guardian in The Girl of the Dreams. At the same time, it possesses Yumi's samurai armor to attack the group. The group searches for Aelita on Lyoko and frees her, while Yumi keeps the living armor at bay until she deactivates the Tower.
In Plagued, XANA possesses rats and unleashes an army on the school, and to eat the students alive. On Lyoko, it tilts the slope of the plateau on Lyoko to make it difficult to fight monsters. It later tries a similar attack using swarms of hornets in Swarming Attack.
In Just in Time, XANA generates waves of ultrasound out of electrical sockets, which can shatter objects, and also cause small earthquakes and structural damage to city buildings.
In The Trap, XANA tries to trap the group inside the Factory, using its mechanical systems, specifically the elevator and the assembly line. Jeremie and Odd are lured into the assembly line, and are attacked by its machines, while it holds the rest prisoner in the elevator. It overloads the boiler to make it explode for Odd and Jeremie, and makes the elevator fill with water to try and drown Ulrich.
XANA possesses laughing gas and to send after the group in Laughing Fit. A small amount gets into Odd's Scanner as he is virtualized, severely weakening him on Lyoko, and chases Jeremie away from the lab interface.
Instead of attacking the city, XANA sets a trap for the group in Claustrophobia, where it electrifies the cafeteria's walls and ceiling, preventing Ulrich, Odd, and other students from escaping. Jeremie and Yumi finished and left before it launched its plan, and stopped the building from collapsing around them.
In Amnesia, XANA possesses a machine that generates microscopic robots to make its own nano-viruses that cause memory loss when one is infected. If left unchecked, this virus will spread out into the world, pacifying the human race for XANA. Ulrich was the first victim along with several others, who goes to help his friends despite his amnesia.
XANA finds a way to attack humans directly in Killer Music. It creates a music file, which is made to transmit a terminal illness that puts anyone who listens to it into a coma, and will die within several hours. It also uses the media for maximum coverage, and eventually gets to the lab too. Aelita deactivates the Tower before everyone in the city is wiped out.
In Frontier, XANA tries to stop Aelita from bringing back Jeremie from virtual limbo. It sends monsters to attack her and guard the Way Tower she needs to enter to get the Scanner's memory before Jeremie is deleted by the Supercomputer's own systems. They manage to fill enough memory to virtualize Ulrich, so he can destroy the monsters and Aelita can get what they need.
In The Robots, XANA builds deadly robots using the machines in the Factory. It has one download the identities of the group from the lab interface, then wreck it. XANA sends the robots after the group at the school. But, the interface was easy to fix thanks to Jeremie.
Its next attack in Zero Gravity Zone involves controlling gravity through the use of the electrical networks. Using street lights, XANA creates electromagnetic fields to upset the magnetic attraction of the Earth, altering the gravity fields inside of targeted areas, making objects float endlessly in the air. It hacks many power stations to gather enough energy, so it can concentrate an enormous field around the soccer game.
XANA tries to eliminate the group on Lyoko in Routine. It activates a Tower to infect the Supercomputer itself this time, stopping devirtualization and making it so they will disappear forever if they lose all their life points. When Jeremie tries to work on the hardware, XANA locks him out of the elevator and gives him a shock when he starts messing with the Supercomputer's circuits.
In Rock Bottom?, XANA melts the ground around buildings in the city, causing them to sink into the earth, including the school buildings.
In Ghost Channel, XANA traps the three warriors inside a Simulation Bubble as they were stopping a different attack. It fools them into thinking they are living on Earth, but they are really stuck inside a virtual simulation. XANA poses as a fake Jeremie to try to get them in the fake Scanners to delete them once and for all. The real Jeremie virtualizes himself inside of the simulation, and convinces the others that he is the real one, because XANA is a program and couldn't fully understand the nature of their friendship. It tries to kill them using the simulation, but Aelita dispels the bubble with her Creativity.
XANA tries to stop Aelita's materialization when it is finally complete in Code: Earth. It sends monsters to attack the group, and Megatanks for the Tower that they are using for the process. This has failed, but XANA managed to secretly take the memories of her former life on Earth to keep her linked to the Supercomputer.
In False Start, after Aelita was made flesh and blood, the group discovered the alteration that XANA made to herself, mistaking it to be a virus implanted in her. When they tried to shut the Supercomputer down, Aelita gets put into a lethal coma, but comes back to life when it's turned on. XANA launches its biggest attack as this happens, using a Scanner to send Kankrelats to Earth and attack the school. Jeremie shuts down the infected Scanner, and Aelita deactivates the Tower.
Season TwoXANA is getting smarter and stronger. It can now create new monsters, possess humans, launch bigger attacks, and use more complex schemes. XANA now wants to steal Aelita's digital memory at any cost. Its attacks are now to get her virtualized, and make sure it can siphon her memory without interference.
In the starting episode, New Order, XANA shows its growing strength, by creating a new monster called a Tarantula, and the monster successfully takes out the three Lyoko Warriors. When XANA sees Aelita wander into a mysterious house called "The Hermitage", it sends a spectre to knock her out, and then possess the house when the others come for her. XANA makes the house throw inanimate objects at them, then tries to lead them into a sauna and boil them, but only catches Ulrich and Yumi. The attack is thwarted before they are boiled alive.
In Uncharted Territory, XANA sends Aelita to a mysterious new sector to try to have her memory drained. When XANA sees her alone on Lyoko, it sends monsters to lead her to the edge of the Forest Sector. Then, sends a strange orb to transport her to a hidden sector called Carthage, then uses Creeper monsters to hold her down, and the Scyphozoa monster to grab her with its tentacles and steal her digital memory. The others save her life and escape successfully.
XANA attacks the Lyoko Warriors as they explore the new sector in Exploration. Its Creepers devirtualize Odd and Ulrich, but they can't materialize into the real world because they are not registered for the Carthage Sector. It also traps Aelita within its walls and sends the Scyphozoa after her. It programs a laser trap for Yumi, but she gets past it and saves Aelita. They discover that Carthage is where XANA lives, and where all of virtual world's data can be accessed. It hatches the Flying Mantas to deal with them, but Aelita escapes and the rest of the group was materialized successfully.
In A Great Day, XANA takes over the time reversions. When the group recovers data from Carthage, XANA plants a trap inside of the information, a virus that lets it take control of going back in time. XANA starts launching repeat return trips, and activates a Tower on Lyoko. The last trip leaves Aelita alone on Lyoko, then XANA unleashes a spectre to possess Sissi. It has her take Jeremie to an isolated place, while the Scyphozoa attacks Aelita. When they stop the return trips and shut down the Tower, Sissi returns to normal with no memory of what she did. This proves that returns in time increase XANA's power, which is how it evolved its newly acquired ability to control and possess humans.
In Mister Pück, XANA possesses Jeremie. Aelita's mysterious visions lead the group to a briefcase of compact discs that contain Franz Hopper's notes. XANA spies on Jeremie and sees him with the case through his computer. Taking action, it tries to possess one of the group. It fails with Odd and Ulrich, but succeeds with Jeremie. XANA has him destroy the discs, then kidnap Aelita and bring her to the Factory. The others rescue Aelita, and Jeremie fights Odd with new pixelated powers. Once the attack is neutralized, they learn that people who have been virtualized to Lyoko a few times are given resistance to XANA. Jeremie is then virtualized again to protect himself.XANA makes a special necklace to control Aelita in Saint Valentine's Day. A possessed delivery boy leaves the necklace in front of her room. She wears it, thinking it to be a gift from Jeremie. XANA activates a Tower, in which Aelita's necklace infects her with its virus, putting her under its control in the real world. She convinces Jeremie to send her to Lyoko. She then heads straight for the Scyphozoa. This plan fails when Jeremie tells Odd to shoot her, gambling that XANA wouldn't risk her life until it gets her memory. XANA is falls for their bluff and the Scyphozoa lets her go. Aelita turns back to normal, and she deactivates the Tower. They smash the necklace, and find a chip which is the source of the necklace's power.
In Final Mix, XANA tries to get Aelita's memory with a kidnapping attempt. It possesses Jim Morales, makes him tie up Jeremie, and brings Aelita to the lab to virtualize her where it wants her. XANA uses Jim and sends monsters to provide interference as the Scyphozoa drains her memory. She was saved by Ulrich in time.
XANA tries an indirect way to steal Aelita's memory in Missing Link. During a mission to Lyoko, the Scyphozoa appears and attacks Yumi instead. It takes her DNA sequence, leaving her unable to be rematerialized. Without thinking it through, Aelita recklessly uses a process to transfer her sequence to Yumi's own, but she doesn't know this alteration will expose her memory for XANA to steal at will. It is using her loyalty to her friends to its advantage. She is stopped by the other warriors and they find Yumi's missing sequence in Carthage's data.
In The Chips Are Down, XANA tries to eliminate the group fighters on Lyoko this time. It creates a massive Krab army on Lyoko, then possesses Nicholas to make him code programs on the lab interface, which changes the rules of battle, making it so the warriors get wounded for real until they succumb to the pain. Jeremie undoes the change, but the Krab army tries to block access to the Tower. Ulrich makes a path to get Aelita through.
XANA acts out of mutual interests with the Lyoko Warriors on two occasions next. The first was in Marabounta, when Jeremie creates his own monster to keep XANA's off their back. It works well at first, but his monster eventually starts targeting Aelita because she is still not fully human yet. To their surprise, XANA sends monsters to protect her, because it still needs her memory and can't let her die yet. It also helps the Lyoko Warriors destroy the Marabounta. Once the threat has ended, the monsters leave them without a fight this time.
The second time that XANA needed their help was in Common Interest. The Supercomputer's nuclear battery was losing power, threatening to shut down forever. XANA possesses a criminal from a prison transport to make him steal a uranium battery. As the current battery fails, Aelita and XANA are put in near-death states a few times. XANA makes the criminal kidnap Jeremie to get him to change the battery, because the possessed human will be put in a coma if he does it, and is certain Jeremie will do it to save Aelita. Now that he is no longer needed, the criminal now tries to kill him. They deactivate the Tower in time.
XANA launches an attack that is directed at Jeremie in Temptation. He tries out a device that he thinks will increase his own intelligence using Time Reversions, but he worsens his health in the process. XANA keeps launching attacks to get him to launch more trips, one of which includes possessing Rosa in the cafeteria. When Jeremie needs to go to the hospital, it possesses the ambulance and makes it speed toward the river. They deactivate the Tower, and a return to the past saves Jeremie and Yumi.
In A Bad Turn, XANA sends real Krab monsters onto Earth. Each one materialized sacrifices a Scanner in the Factory. It deliberately leaves one Scanner intact, so the group could virtualize Aelita first before anyone else. In that instant, it creates another Krab and wrecks the last Scanner, thus leaving her with no bodyguards to protect her from the Scyphozoa. The three Krabs are sent to Yumi's house, the school, and in the above portion of the Factory to deal with rest of the teenagers. XANA thinks it will be easy to steal Aelita's memory, but it underestimates her survival skills and fails again.
XANA launches a zombie attack in Attack of the Zombies. XANA possesses Odd's dog, Kiwi, and modifies him, so that when he bites someone, that person gets turned into a zombie. It tries to zombify the entire school and to get Aelita to Lyoko with the fewest bodyguards possible by biting Odd, but not Jeremie or her. The dog then goes after Jeremie after he completes their virtualization. Also, later into the battle, it makes the entire plateau invisible to confuse the group. Aelita can sense the path, and takes advantage of the fact that monsters still won't dare try to fire on her to get to the Tower.
In Ultimatum, XANA tries a hostage situation to coerce Aelita into giving up her memory. It takes control of Principal Delmas, so he can kidnap Yumi and Odd and take them to a hidden refrigerator warehouse. XANA then gives Jeremie its ultimatum through his mobile. They are saved as the time limit expired by using Jeremie's new EMP bomb, which temporarily knocks out Delmas. He regains consciousness, and now chases and attacks the escapees at the Factory even as Sissi helps them. Aelita deactivates the Tower in time.
In A Fine Mess, XANA takes advantage when Yumi and Odd switch bodies. This also makes them unstable and could be disintegrated at any moment. When they are virtualized, this will happen instantly if they are devirtualized on Lyoko. XANA sends monsters to target and destroy them. It has a Megatank surprise devirtualize Ulrich. When they travel to Carthage to get information, XANA modifies the gravity in the inner chamber, which gets the two of them stuck in mid-air, and is a chance for the Scyphozoa to grab Aelita. The two rescue Aelita and get her to the other side to access what they need and restore themselves.
XANA attempts to divide and conquer in XANA's Kiss. It creates a polymorphic spectre, a ghost that can change its appearance at will, and has it shapeshift into different members of the gang and kiss people to sow jealousy between them, and then trick Aelita into going to Lyoko while they are caught up in their own hurt feelings. They discover its true nature, and instead, XANA has the clone mess with them as much as possible. During the fighting on Lyoko, XANA deletes the bridge to the Tower after Aelita crosses to isolate her with the Scyphozoa. She is saved, and she deactivates the Tower.
In Vertigo, XANA attacks with a possessed pack of wolves in the woods when a failed anti-virus that Aelita is injected with makes her invisible in the real world and unable to enter Towers. This gives the Scyphozoa a chance, but she is saved. Jeremie restores her own signature in time to shut down the Tower.
XANA manipulates the weather for another scheme in Cold War. It triggers Towers on Lyoko one after another to fake an malfunction, so Jeremie and Aelita would stay in the lab to try and fix the problem, while the rest go to lunch. XANA then possesses clouds in the sky to create a deadly blizzard on the city that goes below freezing level, trying to trap the heroes at school and get Aelita to go to Lyoko alone. When Odd manages to get to the Factory and virtualized, Flying Mantas suddenly appear on Lyoko and create minefields to block escape from the Scyphozoa and access to the Tower. Odd uses a Manta to start a chain of mine explosions that open a path to the Tower.
In Déjà Vu, XANA messes with Aelita's head. It activates a Tower to show Aelita mental visions of her former life using her link to the Supercomputer. This compels Aelita to go to Carthage to find answers. She willingly takes the bait and lets the Transport Orb take her when it's called by XANA, despite Jeremie's protests. The Scyphozoa attacks her twice during this trip, and is stopped both times.
In Tip-Top Shape, XANA possesses the nurse for another Aelita kidnapping attempt. Jeremie decides to test out an experiment which will give a person the powers of a pixelized human. Odd volunteers, and is enhanced by a spectre of Jeremie's design using an active Tower in the Mountain Sector. At first, he fights well against Yolanda, but XANA takes control of the Tower, using it to overcharge his energy until it kills him. While Aelita and Yumi help Odd first, XANA cloaks the Mountain Sector in impenetrable fog. They save Odd in time and deactivate the original Tower in the end.
XANA simply attacks the group in Is Anybody Out There?. It creates a ghost monster, and has it go after the heroes. It has also corrupted the Superscan, so they can't detect the activated Tower. Yumi and Aelita go to Carthage to try fixing it, and Odd searches for the Tower on Lyoko. They fail to push the key, and Aelita is left alone with the Scyphozoa. Odd is devirtualized, but gets up to the lab to send the Transport Orb for her before she is caught. She deactivates the Tower, and a return to the past fixes the Superscan.
XANA poses as Franz Hopper to trick them in Franz Hopper. It uses the one, undetectable Tower in Carthage to generate a spectre as Franz Hopper, the mysterious creator of Lyoko. The spectre turns the entire group against Jeremie, saying the Scanners were too dangerous. He sends the three to Carthage to get the presumed anti-virus data. The trap is sprung when he virtualizes Aelita in the Desert Sector. He devitalizes the group's weapons, shuts off the Scanners, and leaves Aelita with the Scyphozoa. Jeremie has seen through its nature, and had a decoy be drained instead. The clone reverts to a ghost and retreats for now. Jeremie restores the Scanners and their weapons, and sends Aelita to Carthage. However, the spectre returns and tries to suffocate Jeremie to death, only to fail when Aelita deactivates the Tower.
It tries to prevent contact between the group and Franz Hopper in Contact. Hopper activates a Tower to possess Sissi, using a white Tower on Lyoko, but she speaks in a unknown language. XANA sends Megatanks to attack his Tower, and possesses a doctor to try and eliminate the spellbound Sissi. The latter makes Aelita go off on her own to deactivate XANA's Tower, which leads to her being targeted by the Scyphozoa. Odd wards them off before they get to her, and she deactivates the Tower.
XANA plans to take over the group's operation to decry pt all of Franz Hopper's notes in Revelation. It ambushes Odd with a polymorphic spectre, which knocks him out, locks him in a pit at the Hermitage, and lets it slowly fill up with water. It has the spectre take Odd's place on Lyoko. As they activate a Tower to launch the decryption, XANA springs its trap as the spectre attacks the warriors, while XANA tries to control the activated Tower. If it succeeds, XANA will gain access to the restricted part of the Supercomputer, which holds both Franz Hopper's and the Lyoko Warriors' data. It has three Tarantulas guard the Tower's wires from Ulrich. XANA has taken out all the obstacles, but its plan fails when Franz Hopper interferes, uses his influence to take control of the Tower away from XANA, and runs the decryption at full speed. It withdraws its monsters away, defeated.In The Key, XANA will finally succeed in stealing Aelita's memory. The group discovers that both Franz and Aelita are programmed with the keys to Lyoko, the true object that XANA seeks. With the keys, it can escape the Supercomputer, and access the world network. Jeremie also finds the true cause of her link to XANA, which is not a virus, but a stolen fragment of herself. He discovers the piece in Carthage, and they go to get it back. They succeed in finding the room that holds the fragment. They are attacked by Creepers, and the pathway falls apart, but Franz Hopper uses Mantas to assist them. However, the fragment was revealed to be a false object made to lure them here. The entire room falls apart around Aelita to devirtualize the warriors and Hopper's Mantas. The Scyphozoa appears, only with nothing left to stop it this time. With her entire memory siphoned, she drops to the floor, completely drained of life. With the keys in hand, XANA activates Towers in all four sectors which render Lyoko nonfunctional, and finally undoes its containment. It then escapes into the world network with all of its accumulated power. Even though Franz Hopper managed to restore Aelita and Lyoko, XANA is now free from the Supercomputer, and shutting it down won't stop it from doing what it wants anymore.
Now that XANA is free, it can use more ruthless attacks on the virtual world itself without any concern. XANA launches attacks on the Core of Lyoko inside Carthage with monsters, while keeping the group busy. It also uses Way Towers to destroy entire sectors by controlling Aelita with the Scyphozoa, and targets the Supercomputer in the real world.
In the starting episode, Straight to Heart, XANA sends a force of monsters to an unexplored room in the Carthage Sector. The group find the monsters firing on a floating blue orb covered with shields, which they identify as the Core of Lyoko. They stop the assault and save the Core.In Lyoko Minus One, XANA possesses a bus full of students, teachers, and the driver and pits them against Yumi. When Aelita goes to the Forest Sector to deactivate the Tower, the Scyphozoa attacks Aelita, and possesses her mind. She enters the sector's Way Tower, and inputs a special code in the Tower's interface, making the Forest Sector disappear and the Tower with it, which turns the class back to normal. XANA intends to cut off their access to Carthage, by destroying all the sectors.
It launches another attempt on the Core of Lyoko in Tidal Wave. It creates a monster made from piles of possessed food supplies in the real world, and modifies the Digital Sea on Lyoko and makes it rise and submerge the Mountain Sector, trying to block access to the Tower and the Transport Orb, and ensure no interference as its monsters attack the Core of Lyoko. They return the sector to normal, protect the core, and shut down the Tower.
XANA tries to destroy the Supercomputer and get Jeremie arrested in False Lead. It hacks into a weapons manufacturing computer network and leaves a trail pointing to him, attracting two government agents. It lures the group to Lyoko with the active Tower, then it activates a Tower in completely different sector. When the agents track Jeremie to the Factory and capture him, XANA possesses them for its true plan. It uses one to keep him occupied, while the other agent successfully unplugs the Scanners and tries to destroy the Supercomputer, to get rid of Lyoko and the group at once. The monsters at the Tower are all Megatanks. The attack was stopped, and Supercomputer was damaged, but was still functional enough to trigger a return trip to the past.
In Aelita, XANA had a plan to distract the Lyoko Warriors using an activated Tower, while its monsters attack the Core of Lyoko undetected. But, unbeknownst to it at the time, Aelita secretly goes on a trip to Carthage to access data about her father. Luckily for them, her unauthorized trip has allowed the heroes to discover XANA's plan and thwart it.
In The Pretender, XANA controls a flock of pixelized crows for a scheme to destroy another sector. It makes the crows attack the group and critically injure Yumi. As Aelita deactivates the Tower, the birds get to Jeremie to stop any returns in time before the Scyphozoa possesses Aelita. The group fails to stop Aelita from getting into the Way Tower and wiping out the Desert Sector, leaving Lyoko with two sectors left, the Mountain Sector and the Ice Sector.
XANA attempts to destroy the Factory with explosives in The Secret. It possesses a demolitions worker equipped with a bag full of charges and a detonator, planting them all across the inside for maximum effect. The Tower was deactivated, but the Scyphozoa possesses Aelita after that, which is the only thing keeping them from launching a return in time to get rid of the charges. Yumi stops Aelita in time before she erases another sector, and the unexpected William Dunbar, disarms the detonator.
As part of a plan to distract the Lyoko Warriors, XANA uses a hallucinating virus within the combined beams of two joined Mantas in Temporary Insanity, and sets it onto Ulrich and Odd. They suddenly act like they're fighting on Lyoko back on Earth, seeing and believing that they are on the virtual world with their friends, and think that any other people are monsters. The virus also works the other way around on Lyoko. This is another scheme designed to keep the group busy while XANA attacks the Core of Lyoko. Their affliction has been dispelled by Jeremie, and the Core was protected.
In Sabotage, XANA tries to crash the Supercomputer's systems through sabotage. It possesses the gardener, has him sneak into the lab, take out the memory cards that are inside the Supercomputer, and slightly scorch them with electricity. This act will cause the entire system to crash in time. XANA also possesses the tree roots in the forest in the park to try and hold them up from fixing it. The activated Tower being used for the latter is also taking up computing resources, which is stopping Jeremie from rebooting the system. Left with no choice, Aelita deliberately uses the Way Tower to sacrifice the Ice Sector and the activated Tower with it, so she can give the Supercomputer enough power to reboot. This leaves only the Mountain Sector left.
XANA uses Ulrich's virtual body to attack the Core of Lyoko in Nobody in Particular. Jeremie tries to virtualize him directly into Carthage. The attempt fails and separates Ulrich's mind from his body. Since his body is now left without a mind, XANA is free to take control of it at will. It upgrades the body's weapons and makes it attack the Core, guarded by Mantas. Ulrich's body is devirtualized and reconnects with his spirit.
In Triple Trouble, XANA attacks when it discovers Odd's three unstable clones. It creates ground-based clouds of smoke that turn humans to stone who are currently on the ground floor. Its goal is to immobilize all three of them, so they can't get to the Scanners to be fused back together and he will disappear forever. The three successfully get to the lab and they deactivate the Tower.
XANA uses a spectre of Jeremie to destroy the last surface sector in Double Trouble. The clone assaults the real Jeremie, and tricks Aelita, Yumi, and Odd into getting virtualizing them. The clone then uses the lab interface to bug up their virtual forms, making them powerless to stop the Scyphozoa from possessing Aelita. The real Jeremie fixes the bugging, but they are too late. She enters the Way Tower, and destroys the Mountain Sector, completely cutting off access to the Transport Orb. With this, XANA is now free to attack the Core of Lyoko. However, Jeremie completes his program to send the group to Carthage directly.In Final Round, XANA wastes no time in attacking the Core of Lyoko. After the group initiates William, only he and Aelita are the only ones available to defend the Core of Lyoko at the time. During William's first mission, he gets cocky as he is fighting monsters. XANA sees his potential, and uses the Scyphozoa to successfully possess him, and makes him go to the Core chamber. He stands at the head of a Creeper attack force that is focused on the Core of Lyoko. With their combined firepower, the monsters take out the core's shield layers one by one. Despite their efforts, they fail to stop XANA from destroying the Core of Lyoko, which occurs by William's own hand, and seemingly puts an end to their interference once and for all. In the digital void, William's virtual spirit floats in an empty limbo and is transformed into a darker version of himself.
In the world network, XANA has infected many supercomputers to expand its power, and now controls William Dunbar. He has been greatly modified, and is used frequently. XANA now wants to eliminate all threats, and targets Franz Hopper, the main threat. It deals with him by trying to throw Aelita into the Digital Sea, knowing he would expose himself to rescue her.
In William Returns, the starting episode, XANA materializes William through the Scanners, which is possible without a Tower. He emerges when the group succeeds in recreating the Carthage Sector. He acts normal, then reveals that he serves XANA when he kidnaps Aelita. William virtualizes himself and Aelita into Carthage, and takes her to an empty Desert Sector to throw her into the Digital Sea. When Odd saves her, William dives in to run back to his new master.
In Double Take, XANA controls Jeremie's activated Tower through William. Jeremie creates a clone of himself using a protected Tower this time. But, XANA has gifted William with his own Tower control abilities, in which he is compelled to use for its own purposes. They both fight for control, but William eventually takes it over for XANA. It makes the Jeremie clone attack the group, and William guards with monsters until they deactivate it.
XANA creates a polymorphic spectre to kidnap Aelita in Opening Act. It takes the appearance of Chris, the Subdigitals' drummer, and sends her to William on Lyoko. Jim and Chris end up fighting the spectre while the rest of the group deactivate the Tower.
It takes control of the group's William clone in Wreck Room. A program to free the real William malfunctions and bugs up files in the Tower that generates the clone. This weakens the Tower's security, stops it from being deactivated, and makes it vulnerable to XANA's influence. It takes over, puts the William clone under its control, and has it attack the group. At the same time, the real William seems to be fighting monsters on Lyoko, making them think that the program worked. However, it was a trick so he could surprise Aelita and take her to the Digital Sea. They deactivate the Tower in time.
XANA attacks as Jeremie constructs a new virtual ship in Skidbladnir. It sends monsters and William on a mission to destroy the Skidbladnir before it is completed. The assault was only narrowly thwarted in the end.In Maiden Voyage, the group give their ship its first test run going into the Digital Sea. Their navigation is disabled during the trip, and they stumble upon a new virtual world in the network. XANA introduces new giant, eel monsters in the Digital Sea to attack them called Kongres.
XANA attacks with a spectre as Jeremie teaches Ulrich, Odd, and Yumi to operate the Supercomputer in Crash Course. During their lesson, it knocks Jeremie out cold, leaving the three of them unable to rely on him this time, and attempts to capture Aelita again and send her to William and his group of monsters. They warn Aelita, defeat all of the enemies, and deactivate the Tower on their own without Jeremie's help.
XANA counterattacks as the group investigate its Replika in the episode Replika. It consists entirely of the Forest Sector. Megatanks arrive to try and destroy their ship. Without the Skidbladnir, the group loses their connection to the Supercomputer and to the Scanners if they get devirtualized. William also appears for a chance at capturing Aelita. They finish their mission in the end.
In I'd Rather Not Talk About It, XANA once again targets the Core of Lyoko. It possesses a wild pig to attack the group in the forest, and sends monsters and William to destroy the Core. XANA also renders the activated Tower invisible to confuse them.
In Hot Shower, XANA schemes to attack with a meteor shower and capture Aelita as it happens. When a large comet passes near Earth, it takes control of a military satellite, and uses its laser to split the comet into shower chunks that will rain upon the Earth, aiming the bulk of them directly at the Factory. XANA also traps the Skidbladnir with a firewall program, so it can capture Aelita as soon as the Skid runs out of power. They overcome the barrier and try to get to the Tower, but the battle against the monsters and William is too much for them. Jeremie tries to tap into the military satellite with Yumi's help, but XANA is a flawless program while Jeremie is only human. Unable to stop the attack, Aelita takes a risk by having Odd devirtualize her where the meteors are, assuming that XANA still needs her alive for its plan. Having guessed correctly, she watches as XANA destroys the comet with the satellite and gives up on its attack.It uses the Scyphozoa to attack the Skidbladnir in The Lake. When everyone except Yumi go to a small island, where Jeremie can't connect to the Supercomputer, XANA creates a sludge monster that inhabits the water and controls lightning, while it uses the Scyphozoa to drain the Skidbladnir of its energy. William and monsters guard the Tower and Yumi faces him. The lake creature's electrical discharges eventually create a storm that will soon incinerate everything on the island. Aelita activates the Skid's shield defense program to destroy the Scyphozoa. They defeat William, and stop the attack.
XANA attacks Yumi when she gets stranded in her Nav Skid in Lost At Sea. The Skid's sonar got messed up and she got lost in the middle of one of their battles. XANA attempts to get rid of her with its sea monsters and William, who has his own Nav Skid to pilot in the Digital Sea. The group was able to save her thanks to this event.In the episode Lab Rat, XANA protects the supercomputer that holds its Forest Replika from the group. Jeremie uses a "teleportation" process to send the group to the Replika's location in the real world. They connect the Skid to a Tower, and he sends them to the laboratory in the Amazon jungle that holds the supercomputer. While inside, they learn that XANA has possessed scientists making cybernetic spiders. William takes out the warriors guarding the Skid's activated Tower, enters and inputs the XANA code into its interface, allowing XANA to take control and sever their link to the real world. The group is left with no choice but to abort the mission.
They set out to complete their unfinished mission in Bragging Rights. XANA activates a Tower to use the cybernetic spiders to deal with the teleported heroes, while it sends William and monsters after the Skid. Ulrich destroys the power supply, which makes the sector disappear, but a backup generator activates and regenerates the Replika. William comes back, and monsters fire on the Skid. Odd ultimately defeats William single-handedly, takes out the spider robots, and destroys the supercomputer all by himself.
In Dog Day Afternoon, XANA attacks by possessing a biker gang that happened to be at the Factory. It has William and Tarantulas wait for Aelita, and also sends Bloks to attack Odd who is currently fused with Kiwi. Odd saves Aelita and she deactivates the Tower.
In A Lack of Goodwill, XANA materializes William using a Scanner while the heroes are busy infiltrating the next Replika. His mission is to destroy the Supercomputer down below in the Factory. However, the William clone shows up with Milly and Tamiya. The clone and the original fight each other, forcing him to use the lab interface to mess with the system. He shuts off the Scanners, destroys the clone, and shuts off the Supercomputer's cooling system to make it overheat and explode. XANA sends new Shark monsters in the network to delay the Skid. William restarts the Scanners to make his getaway back to Lyoko. Aelita stops the overheating process in time and saves the Supercomputer.XANA tricks Aelita using her emotions in Distant Memory. It pretends to be Franz Hopper and sends her an electronic message, saying that he is expecting her on Lyoko, then her computer suddenly bugs up. Aelita goes and enters a Simulation Bubble containing a replication of Aelita's childhood home. By noticing that her mother wasn't programmed into the simulation, she quickly learns this is a XANA trick. William was waiting for her inside to capture her. XANA tries to trap her inside the simulation bubble, but Aelita uses Creativity to disperse it. The Lyoko Warriors try to protect Aelita, but William succeeds in throwing her into the Digital Sea. But suddenly, she is lifted from the sea by the real Franz Hopper, who appears as a floating blue bubble. William and the monsters are focused on eliminating Franz Hopper, but don't succeed. The group now realize why XANA wants to throw Aelita into the Digital Sea. It knows it's the only way to get Hopper to expose himself.
XANA launches a counterattack in their second trip to the Desert Replika in Hard Luck. At the military base where the supercomputer is located, XANA activates a Tower to teleport Kankrelats into the real world to counter the intruders. In the facility, there lies an assembly line that makes motherboards and electronic implants. Ulrich manages to take out all of the Kankrelats and destroy the supercomputer by himself.XANA attacks when Jeremie rides in an armed fighter jet in Guided Missile for winning a contest. XANA possesses the jet to use its weapons to target and destroy the Factory and the Supercomputer with it. Monsters delay the group, and William shows up to capture Aelita. XANA also forces the jet to crash to get rid of Jeremie too. Ulrich defeats William and sets Aelita free to stop the attack and launch a return in time.
In Kadic Bombshell, XANA seizes an opportunity when a glitch is created in the Supercomputer because of Odd bringing someone into the lab. The glitch causes problems with virtualization. Aelita goes in to check for active Towers. XANA sends monsters and William to the location to capture her. William tries to push her into the Digital Sea, but Odd saves her.
In Canine Conundrum, XANA possesses Jeremie's robot dog in his room, and gives it the ability to replicate multiple copies of itself to attack the school. William and Tarantulas appear to guard the activated Tower on Lyoko. Aelita tricks William with a clone of herself, and gets to the Tower while he is distracted.XANA counters them in the next Replika in A Space Oddity, which is a copy of Carthage. Its supercomputer is on a newly built space station orbiting Earth, and is manufacturing small, metallic spheres. Meanwhile, XANA activates the Replika's defense mechanism, which is charging a mass of energy that threatens to wipe out the Skid. Ulrich finds the key to stop the mechanism. XANA attacks the ones in the real world by activating the spheres, which can extrude spikes and burn through metal. Odd and Yumi sabotage the supercomputer by breaking cooling pipes and short-circuiting it with water, completing their mission.
XANA tries to cripple and destroy the Skidbladnir while at sea in Cousins Once Removed. While Jeremie leaves a program for the shields running on his room computer, Sissi and Herb mess with it and unknowingly endanger them in the middle of a battle. Jeremie puts up a firewall, after which XANA possesses Sissi and Herb and takes over. It unleashes the Kalamar monster to attack the ship, while Herb breaks through the firewall and disables power to shields and weapons. Jeremie cuts power to the building, severing Herb's connection to the Supercomputer, and restoring their defenses. They destroy the monsters, and deactivate the Tower.
In Music To Soothe the Savage Beast, XANA kidnaps Aelita again by possessing her show manager, and sends her to Lyoko, surrounded by monsters and William. It also possesses Milly and Tamiya to delay the group backstage at the concert. They save Aelita and deactivate the Tower.
XANA uses the Scyphozoa to control Aelita again in Wrong Exposure. It takes control of Principal Delmas to kidnap Aelita and take her to the Factory, and virtualize her alone on Lyoko, so the Scyphozoa can capture her mind. Its plan is to make the brainwashed Aelita walk into the Digital Sea by herself. Jeremie activates a program he made earlier to reboot everything inside of the virtual world and break her possession.
XANA launches a standard attack in Bad Connection. It uses the school's cell phone antenna to spread a virus to everyone who answers their mobile, turning them into crazy, mindless slaves to be sent after people at the school. It uses monsters to guard the Tower, and plants a bug in the lab terminal to make it hard for Jeremie to execute commands. Aelita deactivates the Tower in time.
XANA fights the heroes in the next Replika in Cold Sweat. This new Replika is an Ice Sector copy and its supercomputer is located in a lab in Siberia. In this facility, XANA is storing brains in test tubes for an unknown purpose. William gets teleported to the base by XANA to deal with the intruders. Aelita enters the Tower that commands his teleportation, but then she realizes that the Tower should contain the programs that XANA uses to control William. She hacks into the Tower's data and transmits it to Jeremie. After deactivating the Tower, William comes back to the Ice Sector Replika. When he is dispatched by the group, XANA suddenly draws on the power of the hundreds of Replikas that it controls to use its ultimate monster: the "Kolossus", a massive creature that resembles a fire elemental with a sword for a hand. It easily devirtualizes Aelita and Ulrich, and almost destroys the Skid.
In Down to Earth, XANA's plans for the world are revealed, and the group breaks William free from its control. Jeremie imagines a program for freeing William for good using the data gathered from the previous episode. They go back to the Ice Replika, in which they discover dozens of humanoid robots lined up like an army at the base. Jeremie realizes that its plan is to create armies of deadly robots to use to conquer the world. XANA activates the robots stationed at the base, and sends them after Odd and Aelita. William goes into the Digital Sea, and comes back up with the Kolossus. Jeremie tries to immobilize the Kolossus, but breaks free and takes out Yumi. The Kolossus to stomps on Ulrich. Aelita is sent back to the Skid unconscious, and the Kolossus moves toward the ship. It seemed that XANA had won, but William is devirtualized by Odd, freeing him from XANA's control and materializing him as his normal self. The Kolossus knocks the Skid into the Digital Sea in one blow, but Aelita was devirtualized. This mission makes little difference. XANA is at the peak of its power. It controls hundreds of supercomputers, and manufactured an army to take over the world.XANA has its last battle with the Lyoko Warriors in Fight to the Finish. Franz Hopper arranges a meeting on Lyoko for the group just when he finishes his multi-agent program for wiping out XANA for good. XANA activates a Tower to possess William once again, who knocks out Jeremie and tries to unplug the Scanners. It also sends a strong force of monsters consisting of the Kolossus and a group of Mantas to destroy the Lyoko Warriors and Franz. Jeremie sends the Transport Orb for Odd and Aelita, since the program has to be activated from Carthage. Ulrich managed to defeat the Kolossus, but the giant's body falls on him, devirtualizing him. At the Celestial Dome, they try to run the program, but the energy requirements are too great. Franz Hopper appears and uses his remaining strength to power the program while being attacked by Mantas. Aelita launches the program, but to her horror, her father is destroyed right in front of her eyes. A powerful force is launched from the Core of Lyoko which destroys the monsters and covers all the sectors of Lyoko. XANA's spectre is forced out of William, writhing in agony. The multi-agent program spreads into the Digital Sea from its floodgate to every Replika on the network. The spectre eventually screams as it vaporizes out of existence. Every trace of XANA on the network has been completely wiped out, ending the threat of XANA for all time.
Other ContinuityCortex. XANA had injected its own source codes into the warriors in their last battle. It hides from the inventor of the Cortex, and sends spectres to Earth and take its source codes back, allowing it to gain complete control of the entire world network.
XANA resurfaces in the starting episode, XANA 2.0. It makes strange computer bugs and short circuits occur at the school, which compels the group to reactivate Lyoko to see if their old enemy has returned. A Tower suddenly activates, and monsters start attacking. On Earth, it creates a spectre with Jim's likeness, and it suddenly grabs Ulrich and he starts getting very weak and ill. They stop the attack.
In the episode Cortex, when the group reprograms the Skidbladnir and enter the Cortex, XANA sends Krabs to stop them from accessing the core, but is met with failure.
In Spectromania, XANA sends a kid spectre to steal source codes. It manages to touch Aelita, Yumi, and Odd before the Tower was deactivated, but this was a ruse to hide a second activated Tower whose signal was masked by the first, which generates another spectre in Ulrich's form. Odd gets to Lyoko and deactivates the second Tower. XANA has gotten back about 70% of its source codes now.
In Rivalry, XANA sends a spectre in the form of William and touched Yumi before it was discovered. On Lyoko, it sends three Tarantulas, making one of them invisible. Odd deactivates the Tower, but with its power at 75%, it is strong enough to relaunch another attack. It disrupts the telephone network, rendering cellphones unusable. William and Ulrich cooperate together and deactivate the Tower.
XANA launches a short attack in Suspicions. It creates a spectre in front of them. Aelita quickly deactivates the Tower, faced with no obstacles at all, before the spectre thought to steal their codes.
In Countdown, XANA creates a polymorphic spectre to infiltrate the school and steal source codes. It touches Odd, and the event gives him speech problems as a side effect. On Lyoko, it creates a wall of Bloks to block access to the Tower. The spectre planned to take their codes in one fell swoop. Odd defeats the Blok Wall and deactivates the Tower before the poly-morph could touch them in the lab. XANA has now recovered 80% of its strength.
In How to Fool XANA, XANA sends a spectre with hypnotic abilities after Yumi. At the time, Jeremie injects false source codes inside of Ulrich that will destroy any spectre that tries to take them. However, XANA discovers this plan thanks to a bug that it planted. Ulrich touches the spectre and implants it with the fake codes, which destroys it before it touches Yumi. This causes XANA to lose some of its source codes, which are likely transferred back to Ulrich.
XANA creates a spectre of Anthea Schaeffer, Aelita's mother, to manipulate her in Rendezvous. It asks her to meet at the chapel through a message. They share a hug, in which the spectre touches her and steals her codes. On Lyoko, it uses two Towers that activate in sequence to prevent the heroes from deactivating them. Laura figures out the sequence and finds a window that allows Yumi and Odd to deactivate them both before Aelita loses all her codes. XANA is at 80% power.
In Chaos at Kadic, XANA activates a Tower from the Cortex to put a virus in the school's computer system, messing up test scores among other problems. They destroy the monsters, and Yumi deactivates the Tower.
In Friday the 13th, XANA infects the Skidbladnir with a virus. It activates a Tower in Carthage to cause lottery wins to happen all over the country as a diversion to buy time for a virus to be implanted in the Skidbladnir. Odd keeps the infected ship out of Lyoko, and counters the virus with Laura and Aelita's help.XANA seemed to malfunction in Confusion. It keeps activating and deactivating Towers, causing spectres to emerge for a few seconds before disappearing, and monsters spontaneously destroy themselves. In the Cortex, XANA has sent an army of Krabs and Tarantulas to fight against Tyron's ninjas in the core. As soon as the Lyoko Warriors arrive, the monsters attack them too. It is revealed that a security update made by Tyron on his supercomputer was the cause of the malfunctions, which it destroyed during the fighting. This proves that both XANA and Tyron both act on their own, and he is completely unaware of its presence inside of his supercomputer.
In The Codeless, XANA sends a spectre in the form of a football player which goes after Odd and steals the last of his source codes. It is now up to 85% power and activates another Tower soon after, sending a spectre with the same appearance as the last one. Yumi and William go after the Tower, but they are confronted by a virtual clone of William created by XANA, who plays on his doubts about his place on the team. William overcomes his feelings and turns on the clone, allowing Yumi to deactivate the Tower.
In An Assured Professional Future, XANA sends monsters to attack the group in the Digital Sea when they discover Tyron's tracking device planted in Carthage and try to get it to the Cortex. It ultimately fails in the end.
The group complete their virus to inject into the Cortex in Obstinacy. XANA sends monsters to stop them, including Mantas that can now operate in the Digital Sea. When Aelita sees her mother in Tyron's lab through the webcam, they stop their plan.XANA's spectre gets caught in a trap by the group in The Trap. Jeremie plans to get source codes back from spectres, in which they create a situation were Yumi lures a spectre into a Scanner, and it works. Jeremie steals 4% of XANA's own codes through the spectre. It tries to escape, damaging the rest of the Scanners in the process. The spectre explodes inside and its residue gets virtualized as a living particle cloud. It puts Yumi and Ulrich into comas with its touch. Since the spectre was made to steal codes, it ignores the codeless Odd. With no codes in the virtual world, the spectre drags the unconscious Yumi to the Digital Sea. Jeremie transfers the source codes he has stolen to Odd, but they now compel the spectre to chase after him. Odd gets into the Tower, and enters the Lyoko code before it touches him. XANA lost 4% power, and Odd is no longer codeless.
XANA attacks using clones to confuse the group in False Pretenses. It sends a polymorphic spectre that shape-shifts into each of the Warriors to steal source codes, and creates perfect clones of them in the virtual world, confusing them. Jeremie and Laura launch a program to make the clones glow, allowing the real ones to devirtualize the fakes, and deactivate the Tower.In Mutiny, XANA takes control of William again. Laura and William decide to act on their own to plant their virus immediately. They enter without much trouble, but he is then surrounded by Krabs. The Scyphozoa appears and implants its tentacles into his body, turning him into XANA's pawn once again. XANA has the Scyphozoa hold him in its grasp the entire time he was being controlled, wanting to steal their coded virus, if it ever gets uploaded into himself. The possessed William commands an army of Krabs and fights the group. Ulrich distracts him long enough for his tentacles to be cut, turning him back to normal.
In Jeremy's Blues, XANA sets a clever trap. It leaves behind a data packet in the Supercomputer with a special code that few people know. Jeremie thinks Aelita's mother sent it, and sends Ulrich and Odd in the Skid to investigate. Then, the Skid gets caught by a security system, springing the trap. XANA sends five Sharks to destroy the ship, and the trap damages the holoweb system, leaving them helpless while being attacked. Aelita gets Odd and Ulrich sent back to Earth, but the Sharks destroy the Skid. This incident has left both the holomap and the Superscan badly damaged. XANA attacks with a spectre in Mrs. Hertz's appearance. On Lyoko, it sends Kankrelats that reform and duplicate to hold back William and Yumi. The spectre gets some of Aelita's source codes. Jeremie quickly fixes the holomap, and they deactivate the Tower. XANA is at 92% power now.
XANA uses another spectre for a particularly offensive attack in Massacre. It sends a spectre in the form of Mr. Rouiller, while Yumi and Aelita are on a mission inside of the Cortex. The spectre steals Odd's codes. XANA has eight Bloks guard the Tower, and Megatanks and Krabs attack Aelita and Yumi. The spectre steals Ulrich's codes also. Aelita escapes and arrives on Lyoko to take out the Bloks. Aelita deactivates the Tower before the spectre takes Yumi's codes. XANA has rendered Ulrich and Odd codeless, and is up to 95% full power.In the final episode, Ultimate Mission, the Lyoko Warriors are forced to implant their virus immediately which would wipe out Tyron's supercomputer, and XANA with it. During their first attempt, XANA's current power level allowed its Mantas to destroy the Megapod and the whole group in mere moments, forcing them to wait twelve more hours to try again. They suffer interference from Tyron in the real world, but they succeed in entering the core. Tyron shuts down his supercomputer to avoid losing all his data as they planted the virus. Unless Tyron finds an antivirus, XANA will be rendered eternally frozen as long as the Cortex stays turned off. If Lyoko stays active, it will still have a way of escaping, so the group shuts down their own supercomputer, but will always remain vigilant should it return.
In this alternate continuity, the events of the first four seasons are severely streamlined as the first book indicates. While the events of the prequel and the first season are followed relatively the same as before, the climax of the rest of the series is compressed into one event. Franz Hopper reveals himself to the group before any equivalent of The Key occurs. He informs the group how to destroy XANA, by launching the multi-agent program into the Core of Lyoko. Hopper sacrifices himself to provide the energy needed, while at the same time restoring Aelita's memories and informing the group about her mother.
As for XANA, the entity is purged and ejected from Lyoko, having lost access to its core functions and left to drift in the network without its memories. Over the course of several months however, XANA begins to gain strength back, and searches for a human vessel in lieu of a virtual world. Ultimately, it looks for a vessel that it can use to infiltrate Kadic without suspicion, so as to kill the Lyoko Warriors.
XANA is an intelligent, computer program that can calculate flawlessly, control digital systems, and wield great supernatural power through the special functions of Lyoko. As a multi-agent system, XANA can access and influence many other systems, and manage multiple tasks at once. Its capabilities are listed below:
XANA keeps a hidden, non-physical presence within the systems, and controls almost all of Lyoko's digital functions. It was originally trapped inside of the Supercomputer, but now that it has the Keys to Lyoko, it can access the full system, and spread itself over the world information network.Towers. Their functions allow it to observe and act in the real world through electrical networks, controlling materialized creatures, using implanted objects, or influencing vulnerable people. XANA's operations can only be countered by deactivating them. Its power to affect the real world grows stronger as it continues to evolve.
The virtual world of Lyoko has special functions that allow XANA to use supernatural forces to control electrical networks. The system's connection to the grid allows it to manipulate electronic devices, hack computer systems with ease, or control and generate electrical energy for many effects, like using outlets to project shocks, cause short circuits, draw power from sources, harness forms of electromagnetic energies to project over specific areas, or broadcast special viruses through electronic waves that can afflict human beings. It also has the power to generate spectres into the real world from connected outlets, which are supernatural ghosts made of pure energy that are living parts of itself. XANA can also turn them into dangerous creatures used to attack in the real world.XANA's spectres also have the ability to possess objects, locations, or living things in a viral manner, which how it mostly uses them in the real world. They allow it to have complete control over what is involved, and even change their physical properties to turn them into threatening forces to attack on Earth. XANA has also become strong enough to be able possess humans, aside from Lyoko Warriors, to do its bidding, and can pixelize their matter to grant them spectral bodies, supernatural physical abilities, generation and manipulation of electrical energy, and other powers. When their Towers deactivate, the possessed objects return to normal, and humans retain no memory of what they did while they were under its influence.
Further in the series, XANA became capable of generating polymorphic spectres. They are ghosts that are pixelized like possessed humans, and can take on human appearances. These kinds of spectres allow XANA to blend in and interact with the real world. XANA either makes spectres with only a set form, or ones that can change appearances at will. The latter are more ideal for infiltration schemes. These creatures disappear from reality when their Towers deactivate. If a polymorph is virtualized to Lyoko, its transforming power also applies with virtual warriors, gaining their complete appearance, powers, and equipment as a result.As XANA evolves in power, it can strengthen and improve their abilities, create new and stronger types, and will be able to send them to other sectors of Lyoko.
The monsters that XANA has used are the Kankrelats, Bloks, Hornets, Krabs, and Megatanks. It has later created the Tarantulas, and uses Creepers and Mantas in Carthage. Its monsters are mostly programmed with Lasers, and each have unique special attacks. XANA has also made the Scyphozoa, a special monster which can drain the memory and life energy from any person or object it grabs, or implant viruses so it can control a person's mind.
XANA can also devise programs to create, transform, or manipulate certain things in the virtual world, which take more resources to use. XANA can use programs that let it change the virtual environment, construct virtual illusions, transform a captured person to its will, launch special viruses, etc. It could also create prisons, like Guardians to imprison individuals, or Simulation Bubbles to trap people in false realities. XANA has also used digital bugs and viruses to infect system functions, created virtual equipment for controlled avatars, and knows how to materialize and teleport its minions into the real world.
After XANA escaped from the Supercomputer, its influence now extends to the entire world information network located under the Digital Sea. XANA can access any databases inside for its own digital uses.
Inside the Digital Sea's virtual environment, XANA can program monsters suited to its unsurvivable conditions to fight its digital enemies, like the Kongres, Sharks, and the Kalamar. It can also set up programs to use against them, like firewall cages to imprison objects, or set virus traps hidden inside network hubs.
Replikas are each made up of one sector, having the same exact functions and compatibilities as the original Lyoko. They are all used to control production and military facilities at specific locations in the real world, using them for experiments, making weapons and electronics, and constructing a vast army of robots that it would use to invade and conquer the world. XANA counters intruders in the facilities by activating the Replikas' Towers. With them, it can remotely control the built weapons, use possessed humans, or teleport real monsters or warriors into the bases to fight them inside the areas.Each of their individual computer resources can also be channelled to run powerful programs, like creating and powering a giant monster that is the ultimate weapon to use against enemies on the virtual world sectors. It is named the "Kolossus", a monster whose vast strength causes instant devirtualization, can wipe out the Skidbladnir in one hit, and is impervious to physical attacks.
- XANA was voiced by David Gasman in Ghost Channel, in the American version of Code Lyoko, the same actor who also voices Herb, Jim, and William.
- According to YTV's Vortex block's host Paula (Code Lyoko was a show on this block and during commercial breaks Paula would often share bits of trivia), XANA was once a good computer program until an evil virus corrupted it. Interestingly she said this piece of information in the middle of season one, before season two even aired. No evidence was stated to prove this fact, as it implies that it was Franz Hopper's abuse of the Time Reversion function that made XANA evil, not a virus. However, the novel series has revealed that it really was a virus that corrupted it in the end.
- XANA's name has a similar name to Xanadu, the virtual world in Garage Kids.
- Since XANA is basically a computer program, it is supposed to be genderless, neither male or female. However, everyone except Franz Hopper constantly addresses XANA by male pronouns (he, him, his, etc.) in the main series. But, in Evolution, XANA is rightfully called an "it" in the series.
|Jeremie Belpois | Aelita Schaeffer | Odd Della Robbia | Yumi Ishiyama | Ulrich Stern | William Dunbar|
|Sissi | Jim Morales | Suzanne Hertz | Anthea Schaeffer | Mr. Delmas | Laura Gauthier | Franz Hopper|
|Kiwi | Herb Pichon | Nicholas Poliakoff | Amelia "Milly" Solovieff | Tamiya Diop | Hiroki Ishiyama | Johnny | Takeo and Akiko Ishiyama|
|X.A.N.A. | Monsters|
|Professor Tyron | Ninjas | X.A.N.A. William|
|Jean-Baptiste Pujol | Theo Gauthier | Emily LeDuc | Taelia | Samantha Knight | Samantha Suarez | Heidi Klinger | Mathias Burrel | Magali de Vasseur | Claire Girard | Brynja Heringsdötir | Patrick Belpois|
|X.A.N.A. Aelita | X.A.N.A. Odd | X.A.N.A. Yumi | X.A.N.A. Ulrich | X.A.N.A. Franz Hopper | X.A.N.A. Anthea Schaeffer | Jeremie Clone | Aelita Clone | William Clone | Subdigitals|
|Kankrelats | Hornet | Blok | Krab | Megatank | Creeper | Manta | Black Manta | Guardian | Tarantula | Scyphozoa | Kolossus|
|Spectre | Polymorphic Clone|
|Kongre | Shark | Kalamar|
|Video games only|
|Cyberhopper | Exploding Roachsters | Scorpion | Insekt | Dark Monster | Volcanoid | Ubertank | Omegatank | Mountain Bug | Insekt Lord | Ice Spider | Desert Driller | Magma Worm|