Tails

Miles Prower, who is better known by the nickname of Tails, is a flying, two-tailed fox from the Sonic series. He will participate in Olympic events in Mario & Sonic at the Olympic Games.

Trivia

 * Tails was thought to be an unlockable character, along with Sonic, in Super Smash Bros. Melee, but this turned out to be an April Fool's prank set up by Electronic Gaming Monthly (a magazine).