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Foos are white cloud-like enemies that first appeared in New Super Mario Bros. Wii. They produce fog that can obscure the player's view. Foos can be defeated with any kind of attack. Their name comes from Fwoosh, a similar enemy from Super Mario 64 and its remake that blows wind.
New Super Mario Bros. Wii
New Super Mario Bros. U
New Super Luigi U
Mario Party 10
Names in other languages