Barrel Buster
From the Super Mario Wiki
Wario with a Barrel Buster in his hand
Barrel Busters are snowmen in barrels, with their head sticking out of the top. They are only found in the fights with Angler Manglers, and Terrible Portraits. The Busters are needed to defeat the Angler Manglers and Terrible Portraits; by stunning the Barrel Buster, picking it up, and doing a Piledriver under the Angler's glowing orb, or one of the Portrait's arms, which will shoot the snowman's head up, hitting the monster's weak point.
