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- Mordecai v.s. Rigby: In "Death Punchies", the game was played in order to decide who would get to be Player 1 in Dig Champs because the Player 1 character had a better utility than the Player 2 character. It was also played in "Pilot" and "First Day" for use of the last clean spoon to eat a bowl of cereal. The game took place at the kitchen table.
- Muscle Man v.s. Rigby: "Flashback" Rigby lost for an unknown reason. The game was set in the kitchen.
- Pops v.s. Rigby: "Flashback" Pops easily smashed Rigby into the door with his eyes closed. The game took place in the hall.
- Skips v.s. Rigby: "Flashback" At a dinner table where Pops and Mordecai were watching, Skips punched Rigby's butt cheek so hard he had to go to the hospital and was too injured to be touched, as an ambulance helicopter came by. Mordecai, Benson, and Skips watched him. This resulted in Rigby's nickname, "The One Cheek Wonder".