How many movies have Joe Gall and Paul Dini collaborated on?

They have worked on 4 movies together! Their first movie together was Tiny Toon Adventures: How I Spent My Vacation (1992) while their highest rated movie together was Batman Beyond: Tech Wars / Disappearing Inque (1999). They have not worked together since Batman Beyond: Return of the Joker (2000). They are most known for their animation films together.