Banzai Bill

Banzai Bills are recurring enemies in the Mario series. They are an extremely large variety of Bullet Bills that first appeared in Super Mario World. Although they seem difficult to defeat, they can be defeated simply by jumping on it.

Banzai Bills also appear in Super Smash Bros. Melee. They are one of the hazards for the Peach's Castle stage. These hazards are common in the Castle stage and inflict damage on contact. They appear from the east or west side of the stage and plunge onto the castle, creating a large explosion. If a character gets caught in the explosion, massive damage will be inflicted on him/her and he/she will be KO'ed without a way to recover. However, Banzai Bills can be easily avoided.

In Super Smash Flash 2
Banzai Bill is an hazard in, he usually flies in every now and then. It crashes into the castle, then after a few seconds, it causes an explosion which can deal up to 10% damage to anyone caught in the explosion along with the fire effect, but it can still damage anyone who touches it before it explodes.