The best part of Ghoulies would have to be the poster art. If you haven't seen the movie, you might think it was a creature feature à la Gremlins. It's actually a very boring movie about a guy who inherits a creepy old house and gets really into black magic. Sure, there are some gloppy puppet creatures roaming about but they're pretty lame. Also, none of them wear suspenders in the movie.
(Image from impawards.com)