Dr. Eggman

Dr. Ivo 'Eggman' Robotnik (also known as Dr. Robotnik in the SatAM cartoon, Dr. Ivo Robotnik in the Adventures of Sonic the Hedgehog, and currently as Dr. Eggman) is the main villain of the Sonic series. He faced off against Dr. Albert W. Wily, and both of them lost to Metal Sonic, but certain fans of his want him to return in certain Death Battles.

Fanon Wiki ideas so far

 * Dr. Eggman vs The Shredder