Ronald Rump is a billionaire playboy who likes to spend money on the latest robot models. He has owned the fighting robot Mona Lethal (whom Robotboy fell in love once in "Robot Love") and another robot who was build for both sports and hip-hop music; Cruelio (from "Robolympics"). Unlucky for this person is that both the robots he had owned got destroyed (although it is possible that Mona Lethal got repaired since she makes a cameo later).