How many movies have Hal Roach and Robert F. McGowan collaborated on?

They have worked on 4 movies together! Their first movie together was One Wild Ride (1925) while their highest rated movie together was The Best of The Little Rascals in 3D (2012). They have not worked together since The Best of The Little Rascals in 3D (2012). They are most known for their comedy films together.