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This is probably something totally different, but it occurs to me that you might have conflated the Gargoyles animated show/movie with the first Ghostbusters movie.
I'm betting it was the animated version of Ray Bradbury's "The Halloween Tree," specifically, the part about monsters and gargoyles.
https://www.youtube.com/watch?v=8MGCqp5mKOk&feature=player_detailpage#t=267s
That's it! Thanks!
Happy to help! The book was a vague childhood memory of mine for about 10 years. I recall reading it in elementary school. I could remember more or less the plot of the book (a bunch of kids trying to find their friend and learning about the history of the Halloween tradition along the way), but not the title.
I finally found it again in high school and re-read it eagerly. ^_^
I saw this movie when I was around eight years old, it was on Nickelodeon, I think. It was the late 90s, '98 or '99, around Halloween, and they were showing a marathon of 'scary' kid's movies and shows,and I never saw it again, despite watching for it every year since.
The part I remember is this: These kids are trying to save their friend, who was sick or dying.. I remember that they thought they'd found him him, trapped in a gargoyle or turned to stone or something? I think either the kid died or nearly died. And I want to think the kids who were trying to save their friend were dressed up, but I'm not sure. It really scared me as an eight year old kid, though, hearing the kid's voice come out of the gargoyle saying 'Helllp meee'.