How many movies have Nerses Gezalyan and Ron Barr collaborated on?

They have worked on 3 movies together! Their first movie together was Scooby-Doo 2: Monsters Unleashed (2004) while their highest rated movie together was Kill Bill: Vol. 2 (2004). They have not worked together since The Chronicles of Riddick (2004). They are most known for their action films together.