How many movies have Lauren Faust and Meghan McCarthy collaborated on?

They have worked on 4 movies together! Their first movie together was My Little Pony: Equestria Girls (2013) while their highest rated movie together was My Little Pony: Equestria Girls - Rainbow Rocks (2014). They have not worked together since My Little Pony: The Movie (2017). They are most known for their animation films together.