The Barrel Cannon is a stage item introduced in Super Smash Bros. Melee, originating from the Donkey Kong series. Once a fighter jumps inside, the barrel can be aimed in different directions before launching its occupant across the stage.
In Super Smash Bros., the Barrel Cannon is often used as a recovery tool, but it can just as easily send careless players flying off the screen if mistimed. Its appearance reflects the classic Donkey Kong mechanic of being shot between barrels, turning a familiar platforming feature into a risky but powerful traversal option.