Little Monsters 1989

Directed by Richard Greenberg | Starring: Fred Savage, Howie Mandel, Daniel Stern, Margaret Whitton

A young boy is scared of the monster under his bed. He asks his 6th grade brother to swap rooms for the night as a bet that the monster really exists. Soon the brother becomes friends with the monster and discovers a whole new world of fun and games under his bed where pulling pranks on kids and other monsters is the main attraction.