Foos are cloud enemies that appear in New Super Mario Bros. Wii. Their only appearance in the game is in World 7-5.
[1][2]A group of Foos fire clouds at Mario.
They act much like a Fwoosh, though Foo's 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 the same method.
Foos can be defeated in all the same ways as other enemies, stomping them or using a Fire Flower.