is a platforming video game developed and published by Nintendo for the Wii. It was first announced at E3 2009 and is the sequel to Super Mario Galaxy. It was released in North America on May 23, 2010; in Japan on May 27, 2010; in Europe on June 11, 2010; and in Australia on July 1, 2010. It is the fourth original 3D platformer in the Super Mario series, after Super Mario 64, Super Mario Sunshine, and Super Mario Galaxy.