Perfect Chaos (Sonic X)

Perfect Chaos (パーフェクトカオス) is a transformation that appears in the anime series Sonic X and its comic series published by Archie Comics. It is one of Chaos's two Super Forms, achieved by absorbing the negative Chaos Energy of all seven Chaos Emeralds

Many generations ago years, Chaos assumed this form to destroy Knuckles' tribe and the rest of the world, but was stopped by Tikal. In the present day when Chaos was brought to earth, Dr. Eggman attempted on two occasions to harness Perfect Chaos' power for world conquest which resulted in Chaos going on a rampage, the first time being on its own accord and the second time under Eggman's guidance. Each time though, Perfect Chaos was defeated and calmed by Super Sonic.