Sonic

Sonic is a super fast blue hedgehog who fights robots. He will compete against Mario and other in Olympic events in Mario & Sonic at the Olympic Games.

Shigeru Miyamoto had this to say:

''Mario and Sonic have been respectful rivals since the early days of video games. In fact, for a long time they have been discussing the possibility of one day competing against each other. Now that they have been given the perfect opportunity to meet at the Olympic Games, we may finally learn who is actually faster, Mario or Sonic?''