So, I'm playing a generation one game, and my Haunter is level 29. It knows Hypnosis, Fire Punch, Confusion and Shadow Punch. It will learn Dream Eater in 10 levels, and I want to know which move I should remove.
Just based on your current moveset, Dream Eater can replace Confusion, mainly because it complements the use of Hypnosis, and both moves have the same typing.