How many movies have Jim Stenstrum and William Hanna collaborated on?

They have worked on 6 movies together! Their first movie together was Scooby-Doo! Meets the Boo Brothers (1987) while their highest rated movie together was Scooby-Doo on Zombie Island (1998). They have not worked together since Scooby-Doo! and the Cyber Chase (2001). They are most known for their animation films together.