Ok.. so far I've been pretty good at remembering movies from when I was a child, but this one has me stumped. This is all I remmeber

I think the kids moved into the new house with their mom and they start to notice things disappearing. That's when they follow this little... goblin... or just little person after it steals something and come to a whole nother world underneath their own. Of course they befriend the small creatures and find out that they are plagued by some evil creature, and they can't go to a certain part of the tunnels they live in. The kids go and try to find out what it is, and realise that its really just an imaginary thing based off the boy's comic books that the creatures took.

I know it's a horrible discription, but if someone knows what it is that would be great!

Ok..so far I've been pretty good at remembering movies from when I was a child, but this one has me stumped. This is all I remmeber

I think the kids moved into the new house with their mom and they start to notice things dissapearing. Thats when they follow this little...goblin...or just little person after it steals something and come to a whole nother world underneath their own. of course they befriend the small creatures and find out that they are plagued by some evil creature, and they can't go to a certain part of the tunnels they live in. The kids go and try to find out what it is, and realise that its really just an imaginary thing based off of the boy's comic books that the creatures took.

I know its a horrible discription, but if someone knows what it is that would be great!
Did the goblin have a missing/broken horn? Had a pathway to the "underworld" under the kids bed (the shadow of it)? Eventually coming to a small war to rid the mean one at the end of the movie (or something like that)?

Lol naw I remember that movie, this one was a cartoon, not the movie with howie mandel.