Ralph-O-Cop was a robot on the Robot Rumble TV show. It was owned by Chief Wiggum and his son Ralph. Ralph-O-Cop rolled on tank treads, wore a police officer's cap, and had a picture of Ralph for its face. For tools, it had one arm that stuck out straight holding a gun. When Ralph-O-Cop fought Chief Knock-A-Homer, Ralph-O-Cop attacked first, charging and firing his gun. The bullets went through Chief Knock-A-Homer's body, hitting Homer (who was secretly inside the robot) in the arms. After that, Homer grabbed Ralph-O-Cop's gun and shot him several times in the head to win the fight.