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Robo Jaku in the anime
Robo Jaku (ロボジャク) is a character from the game Heybot! Hebo Hebo! Heybotournament!, a Roboca Bot with a tape measure (makijaku) design.
Robo Jaku has a brief appearance in episode 31, where he lost a beigoma match against Heybot due to the stone top he obtained from Robo Drill. He gives him the ultimate battle pencil as reward, which is used to defeat Robo Giri.