Little Monsters(1989)

movie - first aired/released 1989-08-25 - audience 5.8

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.