How many movies have Andy Lewis and Margaret M. Dean collaborated on?

They have worked on 4 movies together! Their first movie together was Batman: Mystery of the Batwoman (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 animation films together.