How many movies have Heather North and Joseph Barbera collaborated on?

They have worked on 7 movies together! Their first movie together was Scooby Goes Hollywood (1979) while their highest rated movie together was Scooby-Doo's Spookiest Tales (2003). They have not worked together since Scooby-Doo! and the Monster of Mexico (2003). They are most known for their animation films together.