How many movies have Curt Geda and Doug Murphy collaborated on?

They have worked on 3 movies together! Their first movie together was Batman: Mask of the Phantasm (1993) while their highest rated movie together was Scooby-Doo! and the Gourmet Ghost (2018). They have not worked together since Scooby-Doo! and the Gourmet Ghost (2018). They are most known for their animation films together.