
Eggman commonly creates machines and robots, including a wide variety of "Badnik" military robots. While he has gone through several major and minor appearance changes throughout the series, his in-game designs retain several basic characteristics, such as his ovate body, red-black-yellow clothing, bald head, onesie, pince-nez sunglasses, and large mustache. In the main video games series, Eggman is a dastardly mad scientist who plans to conquer the world to build his own empire. 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 arch-nemesis of the series' eponymous main character.

Eggman was created and designed by Naoto Ohshima as part of many design choices for Sega's new mascot. Jim Cummings (1993–1994) ( SatAM) (AoStH, unaired pilot) ĭoctor Ivo " Eggman" Robotnik is the main antagonist of Sega's Sonic the Hedgehog franchise.
