How many movies have Frank Welker and Jonathan Winters acted in together?

They have worked on 6 movies together! Their first movie together was The Little Troll Prince (1987) while their highest rated movie together was The 1st 13th Annual Fancy Anvil Awards Show Program Special: Live in Stereo (2002). They have not worked together since The Smurfs 2 (2013). They are most known for their animation films together.