Eggman Nega

Eggman Nega, also known as Dr. Nega, is a recurring villain from the Sonic the Hedgehog series. He comes from a different dimension that is actually the future and is the direct descendant of Dr. Eggman. Blaze the Cat, Silver the Hedgehog, Shadow the Hedgehog, and Sonic the Hedgehog are his main foes.

''Mario & Sonic at the Olympic Winter Games
Eggman Nega appears as a boss in the Festival Mode and the Adventure Tours. He must be faced in Ski Cross for the Wii version and Nordic Combined and Skeleton for the DS version.