Dr. Ivo Robotnik

Doctor Ivo "Eggman" Robotnik
Sonic the Hedgehog character
Doctor Eggman as seen in Sonic & All-Stars Racing Transformed
First game	Sonic the Hedgehog (1991)
Created by	Naoto Ohshima
Voiced by (English)	Video games: Deem Bristow (1998–2004) Mike Pollock (2005–present) Cartoons: Long John Baldry (AoStH) Jim Cummings (SatAM and AoSTH pilot episode) Garry Chalk (Underground) Mike Pollock (Boom) Anime: Edwin Neal (OVA) Mike Pollock (X)
Voiced by (Japanese)	Video games: Masaharu Sato (1993) Chikao Ohtsuka (1998–2015) Kotaro Nakamura (2016–present) Cartoons: Kōichi Hashimoto (AoStH, SatAM) Anime: Junpei Takiguchi (OVA) Chikao Ohtsuka (X)

Doctor Ivo "Eggman" Robotnik (ドクター・エッグマン^?, Dokutā Egguman, ロボトニック Robotonikku) 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 one of many character designs 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, as well as making him become the archenemy of the series' titular main character.

In main line of video games, Dr. Eggman is a rotund mad scientist who plans to conquer the world in order to build his own Eggman 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 egg-shaped body, red-black-yellow clothing, pince-nez sunglasses, and large mustache. Eggman possesses ability of creating machines and robots (including wide variety of Badniks), as notably in early games, he has served as a recurring boss in almost every level for piloting one of his created vehicles.

Dr. 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, animated TV series and an original video animation. Dr. Eggman has also been very well received by critics and fans alike, while remaining as one of the most popular and recognizable villains in gaming.