I think I remember a few Disney original films, one was about this brother and sister that worked with a trio of ghosts to fight against this male spirit who was pretty much causing problems in the city because he was falsely accused of being a warlock or something (I can't remember the name or the exact plot) and the second was about some high school aged girl meeting her little brother's imaginary friend and trying to get her brother to believe in his friend again because well he was shifting into some kinda monster and a lot of pranks were going on around town.
I think I found the one about the imaginary friend, it was called "Don't Look Under the Bed". https://en.wikipedia.org/wiki/Don't_Look_Under_the_Bed
Oh, the second was called Scream Team. https://en.wikipedia.org/wiki/The_Scream_Team
I found a list of Disney Halloween films in case anyone wants to give them a review. https://disneymovieslist.com/list-of-disney-halloween-movies/