How many movies have Carl Steven and Frank Welker acted in together?

They have worked on 3 movies together! Their first movie together was Star Trek III: The Search for Spock (1984) while their highest rated movie together was Scooby-Doo: Agence toutou risques, vol. 1 : Le voleur de vélo (2007). They have not worked together since Scooby-Doo: Agence toutou risques, vol. 1 : Le voleur de vélo (2007). They are most known for their comedy films together.