Third title in the Mario & Sonic series. Released in 2011 for the Wii, and 2012 for the Nintendo 3DS.
No new playable characters are introduced in this game.
This game introduces gymnastics outfits for Peach, Daisy, Amy, and Blaze, which are also worn during Aquatics events. No other characters have alternate costumes except for Sonic, who wears a blue life vest during Aquatics events.
This tag implicates mario_&_sonic_(series) (learn more).