The Pirate Robot attacks Goku, Krillin, and Bulma when they arrive in an harbor inside the Pirate Cave, looking for a Dragon Ball, as well as the pirates' treasure. It was equipped with a sword (which Krillin destroys during their battle), an arm-mounted cannon with a machine gun and flamethrower functions, a powerful tail that could electrify people trapped in its coils, and jets in its feet that allowed it to hover in the air and move quickly across ground and water.