Sega today announced that Mario & Sonic at the Olympic Games has sold five million copies worldwide in just over three months since launch. Developed for the Wii and the Nintendo DS, the game unites the two rivals under the same title for the first time in history. In the spirit of the Olympic Games, the mascots also brought friends from their franchises along, including Luigi, Knuckles, Yoshi and Tails. Check the press release for more sales facts.