How many movies have Gil Iverson and Marilyn Schreffler collaborated on?

They have worked on 3 movies together! Their first movie together was Yogi's First Christmas (1980) while their highest rated movie together was Scooby-Doo and the Ghoul School (1988). They have not worked together since Scooby-Doo and the Ghoul School (1988). They are most known for their tv movie films together.