Ururuun (ウルルーン,Ururuun?) is the miniboss in Grenade Man's stage from Mega Man 8. It's a giant eye that attacks by tackling Mega Man or dumping junk above him. It surfaces from the junk pile that is its arena and surrounds itself with layers of junk which can be destroyed. Astro Crush seems to be its weakness. Defeating it gives Mega Man the Rush Bike.