Ty-Foos are pretty rare enemies that resemble clouds and are pretty rare, as they only feature in two levels in 3D World. They tend to be more of obstacles than actual enemies, though. Ty-Foos will blow a strong gust of wind, usually to try and knock you into a pit or into some spikes. For the most part, they will sit still in one place, but some of them will move back and forth. You can stun them with ranged attacks, like a Fire/Boomerang Flower, but they can’t be defeated, unless you have a Super Star or other invincibility item.