Omega

Omega is a character from the Sonic the Hedgehog series created by Dr. Eggman. He appeared in Sonic Heroes where he, Shadow, and Rouge joined as a team.

Super Smash Bros. Brawl
Omega only appears as a sticker.

Mario & Sonic at the Olympic Winter Games
Omega appears in the game as a boss of the Ice Skating race. In Individual Festival Mode & Adventure Tours, he is the boss of Speed Skating 500m. In Team Festival Mode, he is the boss of Short Track Relay.