How many movies have George Lucas and Roger Mussenden collaborated on?

They have worked on 17 movies together! Their first movie together was The Adventures of Young Indiana Jones: Mystery of the Blues (1999) while their highest rated movie together was The Adventures of Young Indiana Jones: The Phantom Train of Doom (1999). They have not worked together since The Adventures of Young Indiana Jones: Love's Sweet Song (2000). They are most known for their tv movie films together.