How many movies have Grey DeLisle and Rich Dickerson collaborated on?

They have worked on 1 movie together! Their first movie together was What's New Scooby-Doo? Vol. 10: Monstrous Tails (2007) and was their highest rated movie together. They have not worked together since What's New Scooby-Doo? Vol. 10: Monstrous Tails (2007).