How many movies have Glenn Leopold and Jim Stenstrum collaborated on?

They have worked on 4 movies together! Their first movie together was A Flintstones Christmas Carol (1994) while their highest rated movie together was Scooby-Doo on Zombie Island (1998). They have not worked together since Scooby-Doo and the Alien Invaders (2000). They are most known for their family films together.