How many movies have Danny Jacob and Jeff 'Swampy' Marsh collaborated on?

They have worked on 5 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 O.W.C.A. Files (2015). They have not worked together since Phineas and Ferb The Movie: Candace Against the Universe (2020). They are most known for their animation films together.