Bull's-Eye Bill

Missile Bills are red Bullet Bill variants that have heat-seeking visuals.

Their first appearance was in Super Mario Bros. 3. In this game, a Missile Bill would turn around once if it missed its target, but would continue going forward without turning around anymore after missing twice.

They make another appearance in Super Mario Sunshine at Pinna Park's beach. In this appearance, they are purple and shot from the Monty Mole's cannon. They always home in, so there is is no way Mario can easily outrun them. They can destroy the baskets on the beach which hold Blue Coins; this is the only way to open them. Missile Bills explode when they make contact with an object, or if Mario squirts water at them.

They also reappear in New Super Mario Bros. Wii. Here, they have a similar attack pattern to the one they did in Super Mario Bros. 3. However, in this game, they can change the angle they are flying at. They only appear in World 9-3, alongside a new sub-species, Missile Banzai Bills.

Trivia

 * Although Missile Bills do not appear in Super Mario Galaxy, Bullet Bills in that game act the same way by homing in on Mario. This is also true with the Bullet Bills fired in Super Mario 64.