How many movies have C. Ernst Harth and J.J. Makaro collaborated on?

They have worked on 5 movies together! Their first movie together was Dudley Do-Right (1999) while their highest rated movie together was Scooby-Doo 2: Monsters Unleashed (2004). They have not worked together since Are We There Yet? (2005). They are most known for their comedy films together.