The PlayCo Armboy is a mechanical arm added to the user's arm to win a game of arm-wrestling. It is featured in the episode, "Over the Top". It was used by Rigby to beat Skips at arm-wrestling until Skips later found out about it when Mordecai told him. In the final game of arm-wrestling, Skips pulls the Armboy off of Rigby's arm and accidentally kills him. Later, Skips uses the Armboy to beat Death in a game of arm-wrestling to save Rigby's life. Skips told Rigby that he only cheated to save his life, and then Skips told him never to cheat again.
- As seen in the commercial, the Playco ArmBoy was developed in Asia.
- Playco ArmBoy was used for Rigby to beat Skips in Arm Wrestling as seen in episode Over The Top.
- It makes a return in A Bunch of Full Grown Geese.