Foo

Foos are white cloud-like enemies that appear in New Super Mario Bros. Wii and New Super Mario Bros. U. They produce fog that can obscure the player's view. The also can be beaten up with any kind of attack.

New Super Mario Bros. Wii
New Super Mario Bros. Wii marks Foos' debut appearance. 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 and in Super Mario 64 DS. They appear only in World 7-5 as a main gimmick.

Their fog vanish after a few seconds. They can be blown away by Spin Jumping or propelling Propeller Mario.

New Super Mario Bros. U
In New Super Mario Bros. U, Foos only appear in Snaking above Mist Valley, and behave the same they do in the predecessor.