How many movies have Jeff 'Swampy' Marsh and Jon Colton Barry collaborated on?

They have worked on 2 movies together! Their first movie together was Phineas and Ferb The Movie: Across the 2nd Dimension (2011) while their highest rated movie together was Phineas and Ferb The Movie: Candace Against the Universe (2020). They have not worked together since Phineas and Ferb The Movie: Candace Against the Universe (2020).