How many movies have Arthur Burghardt and Christopher Collins acted in together?

They have worked on 5 movies together! Their first movie together was G.I. Joe: A Real American Hero (1983) while their highest rated movie together was G.I. Joe: Arise, Serpentor, Arise! (1986). They have not worked together since G.I. Joe: The Movie (1987). They are most known for their animation films together.