Doctor Robotnik/Eggman

Doctor Julian Robotnik is the primary villain of Sonic The Hedgehog (SATAM) and a supporting character in Disney vs Non-Disney Villains. He debuts in the second part of the series, and joins forces with Kent Mansley and his shadowy group of intelligence agents.

Vs Norton Nimnul
Doctor Robotnik first entered the war upon being contacted by Kent Mansley to work on a top secret project. Mansley claimed he needed the world's greatest inventor, which appealed to the Doctor's ego. When he journeyed to meet Mansley, he was outraged to find that the government agent had also invited another scientist, Professor Norton Nimnul, to the meeting. The two scientists soon got into an argument and vowed to defeat one another. Mansley promised that the winner would earn the right to work on his new project. Robotnik did not appreciate being treated like a petty hiring, but his curiousity had been peaked, and he resolved to destroy Nimnul.

Nimnul, however, went on the offensive. Breaking into Robotnik's lab and stealing a robotisization ray, which he used on Robotnik's arm. Swearing revenge, Robotnik pursued Nimnul across the city and opened fire on his inferior vehicle (a converted bus). Nimnul managed to parachute out of the bus before it exploded, but this went unnoticed by Robotnik, who assumed he had been killed in the crash.

The Villain-Prison
Impressed by Robotnik's handling of Nimnul, Mansley contracted him to start work on his classified project - a state of the art, highly secure prison to house any upstarts, criminals, renegades and enemies of King Ruber. Robotnik contributed much to the overall design and security systems of the prison, and supplied his elite Swat Bots as the prison's security guards. He was subsequently granted a seat on King Ruber's leadership council.