SMBDX Bill Pic
Bullet Bills are bullet-like projectiles in the HTFA series. They are usually under Bowser's control, acting as enemies of Cuddles since their debut in HTFA 5. When the Happy Tree Kingdom is overrun by Bowser, Bullet Bills are Bowser's prime ammunition. They are usually shot from a large cannon (the Bill Blaster), though are sometimes shot from off-screen, and fly in a straight line. To defeat a Bullet Bill, the player has to jump on them (at least in the games that have the stomping mechanic).