Doctor Eggman

Doctor Eggman[a] is a fictional character and the main antagonist of Sega's Sonic the Hedgehog series. His original character designer was Naoto Ohshima, who created him as part of many design choices for the company's new mascot. After the creation of Sonic the Hedgehog, Ohshima chose to use his previous egg-shaped character to create the antagonist of the 1991 video game Sonic the Hedgehog, making him the archenemy of the series' eponymous main character.