How many movies have Bill Wolf and Fred Wolf collaborated on?

They have worked on 3 movies together! Their first movie together was The Mouse and His Child (1977) while their highest rated movie together was Teenage Mutant Ninja Turtles: The Epic Begins (1988). They have not worked together since Teenage Mutant Ninja Turtles: Planet of the Turtleoids (1991). They are most known for their animation films together.