Dr. Ivo Robotnik (also known as Dr. Eggman) started out as Robo-Robotnik V2.0, an alternate timeline version of Robotnik Prime with whom he shared much of the same history. The point where they differed was that while Robotnik Prime was destroyed by his own Ultimate Annihilator, Eggman subjected himself to Roboticization in a last-ditch effort to defeat the Freedom Fighters of his world. Though he failed, an encounter with Robotnik Prime inspired him to strike back, annihilating the House of Acorn and many other inhabitants of his world. Thus left with no enemies to destroy, he traveled to Mobius Prime to fill the void left by the demise of Robotnik Prime. He swiftly took on a new appearance and became an even more dangerous threat than his predecessor.