King Cannon

For the Trump Siblings, this weapon represented their strongest card of all. Mounted on four wheels, the tank supports a colossal barrel shaped like a corkscrew and its frame is dressed in the four suits found on a deck of cards, the diamond, spade, club, and heart. A meter on the left flank measures how much charge has built up before a shot can go off, and a ramp at the rear feeds in the drill-marked, bullet-shaped shells. The origin of the machine traces back to the Trump Siblings' takeover of Clockwork Island years prior, when they pressed the local scientists into constructing it so that Bear King might rise to become Pirate King.

Each round leaves the barrel spinning with drilling force, hard enough to throw off shock waves that travel across a stretch of open water. On one occasion a deflected shot produced vibrations so violent that a heavy sheet of tempered glass simply burst. That very quality proved the weapon's undoing. After Bear King fired at Luffy, the rubber-bodied pirate flung the drilling shell straight back; Bear King's rock-hard body held off the point, yet the spinning projectile's tremors fractured the tempered-glass surface the cannon rested on, sending both the machine and its owner tumbling into the abyss as the leftover shells went up in a final blast.

Bear King of the Trump Siblings owns and operates the cannon. He meant to show it off by executing three captured Straw Hats, but Luffy cut in before a shot could be loosed. Mid-battle, the thief Borodo swung the barrel toward a distracted Bear King and missed, hitting the far-off sea, and when Bear King retaliated at Borodo, Akisu leapt in and absorbed the round. The explosion that followed Bear King's plunge wiped out Clockwork Island's key, the cannon, and Bear King in one stroke.