From the Super Mario Wiki
Diamond Troll is a monster that appears in WarioWare: Twisted!. It lives in a hut on Diamond Knoll. The Diamond Troll is encountered by Kat and Ana while they are running away from a swarm of bees. The troll attacks them unprovoked, and Kat and Ana fend off the monster. In the end, the twins, with help from their pets Shuriken the Falcon and Shadow the Dog defeat the troll and escape from his hut.