This article is about the mainstream version of Dr. Ivo "Eggman" Robotnik - you can find information on other versions on the disambiguation page. Evil-doer Dr. Ivo "Eggman" Robotnik is main antagonist of the Sonic the Hedgehog video game series. He is a mad genius bent on world domination. He was voiced by Mike Pollock in the English dub and Motomu Kiyokawa in the Japanese dub.