Do joker and Michael Myers coinside?

Answer 1

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.

Answer 2

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.