Never. The Joker is from the Batman movies, which are action movies and not meant to be Horror at all. However, Michael Myers is the slasher from the classic 'Halloween' movie series. They never have appeared in the same movie, nor at the same time.
No, they do not. They exist in entirely different worlds. Michael did once wear a clown mask, but that is the closest thing to anything Joker-like that Michael is shown to have interacted with.
Michael Myers is a man.
Michael Myers
Michael Audrey Myers.
No, Michael Myers is a fictional character.
Michael Myers was the killer in HalloweeN.
Michael Myers is a fictional character.
Travis michael Myers is 5' 11".
Michael Myers is cute
She was raped
Michael Edgar Myers is 5' 10".
Eric Myers
No. Michael Myers is a fictional character in the Halloween movies. He is not real.