80s monster movie, possibly slapstick? Monster with fins.

I used to watch this movie when I was little, but I can't remember the name of it. I think it was probably from the late 80s early 90s. I think there was a little boy in it who had a monster friend who was green? All I remember was that the kids mom made him drink some healthy green juice that she...

This movie was from when I was a child...so my recollection is blurry. I think this movie is a about a kid that turns into a monster. This monster is purple-ish, blue and furry. Not sure what the kid did to get himself turned into a monster, but that's all I know. Can't seem to figure out the...

80s movie (assuming) for kids where there is a kid that hears something under his bed,so he lays corn chips and set traps to try and find out what this thing is. Ends up it's a monster that shows him another world via a portal thing under his bed. Any ideas? Thanks in advance if you can help!

Here's a hail mary.......This has been driving me insane for years....My brother and I very vaguely remember a movie from the 80s about a boy and an alien that we called the "green goblin" movie when we were kids back then (probably around 7 and 10 yrs old). We really do not remember anything about...

I'm trying to find this monster movie from I believe the 80's where this guy is wearing an Easter Bunny costume and a monster gets into his suit and kills him. And then he falls in through a church window.