The Bullet Bill is a common enemy which appears in Super Smash Bros. Brawl's Subspace Emissary mode. They fly from right to left, exploding upon impact with a character or on the ground. They also appear in Donkey Kong's introduction, in which three of them are destroyed by Diddy Kong. They can be reflected, but will quickly right themselves and continue their attack. Some of them are guided missiles, following players until they hit.