is a video game character and the main antagonist of the Sonic the Hedgehog series created by Sega. He is a rotund mad scientist with an IQ of 300, who plans to conquer the world in order to build his own Eggman Empire, and is the archenemy of Sonic the Hedgehog. His original character designer was Naoto Ohshima, and 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 egg-shaped body, red-black-yellow clothing, pince-nez sunglasses, and large mustache.