How many movies have Frank Welker and George Doty IV collaborated on?

They have worked on 2 movies together! Their first movie together was Scooby-Doo! and the Loch Ness Monster (2004) while their highest rated movie together was Scooby-Doo! in Where's My Mummy? (2005). They have not worked together since Scooby-Doo! in Where's My Mummy? (2005).