Doctor Eggman

Doctor Ivo "Eggman" Robotnik is the main antagonist of Sega's Sonic the Hedgehog franchise. Eggman was created and designed by Naoto Ohshima as part of many design choices for Sega'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 arch-nemesis of the series' eponymous main character.

In the main video games series, Eggman is a dastardly mad scientist who plans to conquer the world to build his own empire. 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. Eggman commonly creates machines and robots, including a wide variety of "Badnik" military robots. Notably in early games, he has also served as a recurring boss, appearing in almost every level piloting a vehicle of his design.

Eggman has appeared in almost every Sonic the Hedgehog video game since his first appearance in the 1991 title Sonic the Hedgehog and is also a prominent character in other media, including comics, novels, and cartoons. He made his live-action cinematic debut in the 2020 film adaptation, portrayed by Jim Carrey. Eggman has been well received by critics and is one of the most popular and recognizable villains in gaming history.