Foo

Foos are a new cloud enemy that appear in New Super Mario Bros. Wii. Their only appearance in the game is in World 7-5. They act just like a Fwoosh, though its wind only produces fog and does not throw Mario away like Fwooshes did in Super Mario 64. Foos do not have menacing demeanors like Fwooshes, and Foos can be neutralized, unlike Fwooshes. Mario can get rid of the fog produced by a Foo by doing a Spin Jump, however, if he is equipped with a Propeller Suit, he can clear the fog faster with said method.

Foos can be defeated in every way possible existing in the game, though some of them are in places that Mario can't access.