Yeti

Yeti is an enemy in Wario Land 4. They appear in the levels of different passages. They are pudgy creatures whose noses are constantly running. Yetis normally move back and forth, but when Wario comes near, they stop to walk and fire an icy breath at him that moves horizontally. When hit, Wario becomes Frozen Wario. Yeti can be defeated by any of Wario's attacks and can be grabbed and thrown as well when they are stunned. For defeating a Yeti, Wario is rewarded with a Bronze Coin. Unlike other enemies that cause a special status, a defeated Yeti does not respawn when Wario re-enters a room.

In the level Fiery Cavern, it is shown that they are related to Iwaos, since the latter creatures will become Yetis when Wario jumps on the switch and the temperature radically changes.