Bull's-Eye Bill

Missile Bills first appeared in Super Mario Bros. 3. They are red Bullet Bills that have heat-seeking visuals. A Missile Bill will turn around once if it misses its target, but continue their way if they miss twice.

They make a surprise appearance in Super Mario Sunshine at Pinna Park's beach. They're purple and shot from the Monty Mole's cannon. Simply spray them with water and they'll explode. They will almost always home-in so don't bother trying to outrun them. They can also be good for destroying the baskets which hold Blue Coins. This is also the only way to open them.