A flamethrower (火炎放射) is a mechanical incendiary device designed to project a long controllable stream of fire.
The Pirate Robot's left arm is equipped with a flamethrower (used only in the anime and in video games).
Shu's Pilaf Machine can throw flames from its "tail". It is used to burn Goku's Turtle School uniform in an attempt to reveal his tail, but Goku's tail was already removed from his fight with Grandpa Gohan.
Appearances in Video Games
A flamethrower is used by the giant Pilaf Robot in Dragon Ball: Origins. Red Ribbon Soldiers use flamethrowers in Dragon Ball: Origins 2. The Pirate Robot and Shu in his Pilaf Machine use their flamethrowers in Dragon Ball: Advanced Adventure, Dragon Ball: Origins 2, and Dragon Ball: Revenge of King Piccolo. In Dragon Ball Z: The Legacy of Goku II and Dragon Ball Z: Buu's Fury, there is a type of enemy called Destroyer that resembles the Pirate Robot and which uses a flamethrower as a weapon.