How many movies have Kirk Johns and Nerses Gezalyan collaborated on?

They have worked on 3 movies together! Their first movie together was A Guy Thing (2003) while their highest rated movie together was Scooby-Doo 2: Monsters Unleashed (2004). They have not worked together since Scooby-Doo 2: Monsters Unleashed (2004). They are most known for their comedy films together.