Dr Robotnik

Doctor Ivo Robotnik (ロボトニック, Robotonikku?), also known by his alias, Doctor Eggman (ドクター・エッグマン, Dokutā Egguman?), is a video game character and main antagonist of the Sonic the Hedgehog series. He is a comically obese scientist with an IQ of 300. His character designer is Naoto Ōshima, and he has gone through several appearance changes throughout the series. The character was named the 15th most diabolical video game villain of all time by PC World.

Source: Wikipedia