How many movies have Joseph Barbera and Sander Schwartz collaborated on?

They have worked on 12 movies together! Their first movie together was Scooby-Doo! and the Legend of the Vampire (2003) while their highest rated movie together was Scooby-Doo! and the Sea Monsters (2012). They have not worked together since Scooby-Doo! and the Sea Monsters (2012). They are most known for their family films together.