|Universe||Nintendo, Character Soft, Mario Co., Ltd, Softnica|
|Full name/Real name||Ururu|
Ururu is the boss of Stage 2 (Mushroom) in Hello Kitty World (Famicom). All he does is walk back and forth and punch Hello Kitty, but he can be defeated by dropping on him or jumping into him from the side.
Ururu is actually a rebranded version of Wacka Wacka Wolf from Balloon Kid; a game that was not released outside of Japan until its release as an upgraded game called Balloon Fight GB, though his official name in Balloon Fight GB is unknown and could also be Ururu.
- Possibly from a wolf onomatopoeia