How many movies have Janet Waldo and Joseph Barbera collaborated on?

They have worked on 7 movies together! Their first movie together was Alice in Wonderland or What's a Nice Kid Like You Doing in a Place Like This? (1966) 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 Scooby-Doo's Spookiest Tales (2003). They are most known for their animation films together.