Spectres usually pixelize normal humans by possessing their bodies. They become supernaturally powerful beings as modified by X.A.N.A. They are virtually impossible to defeat with physical force alone.
It manipulates their physical matter to transform them into entities that have supernatural powers. Their now spectral bodies make them virtually immune to harm, but when they get struck, their bodies are disrupted and reform after a brief moment. They have inhuman physical abilities like enhanced strength and speed, can levitate to a degree, and also manipulate electromagnetic energies in supernatural ways to project blasts, affect minds, move objects through will, and influence technology from close distances. Other powers include walking through walls, self-replication, and hypnosis through eye contact.
Polymorphic spectres are also pixelized beings made and controlled by X.A.N.A.
Their only weakness is contact with electromagnetic waves, which disrupts their bodies' molecular structures, but will eventually recover if the waves stop.