The conversation between human and AI assistant.
What are the 10 worst things The Joker has ever done to Batman?
Have Batman and The Joker ever teamed up before?
Yes, there have been a few instances where Batman and The Joker have sort of teamed up, although it's always been a very uneasy alliance. In one comic, they team up briefly to stop a common enemy (the Joker begrudgingly agrees to help when he realizes the villain is even crazier than he is), and in another story they team up to escape a different villain's trap.