How many movies have Alan Burnett and Michael Goguen collaborated on?

They have worked on 4 movies together! Their first movie together was Batman: Mask of the Phantasm (1993) while their highest rated movie together was Scooby-Doo! Mask of the Blue Falcon (2012). They have not worked together since Scooby-Doo! Mask of the Blue Falcon (2012). They are most known for their animation films together.