How many movies have Gian Ganziano and Matt Stone collaborated on?

They have worked on 3 movies together! Their first movie together was South Park: Bigger, Longer & Uncut (1999) while their highest rated movie together was South Park: Post COVID: The Return of COVID (2021). They have not worked together since South Park: Post COVID: The Return of COVID (2021). They are most known for their comedy films together.