How many movies have Jeff Shiffman and Otis Van Osten collaborated on?

They have worked on 2 movies together! Their first movie together was Leroy & Stitch (2006) while their highest rated movie together was Scooby-Doo! Legend of the Phantosaur (2011). They have not worked together since Scooby-Doo! Legend of the Phantosaur (2011).