How many movies have Frank Welker and Robert J. Walsh collaborated on?

They have worked on 2 movies together! Their first movie together was The Looney, Looney, Looney Bugs Bunny Movie (1981) while their highest rated movie together was G.I. Joe: Arise, Serpentor, Arise! (1986). They have not worked together since G.I. Joe: Arise, Serpentor, Arise! (1986).