How many movies have Lisa Chess and Lynn Stalmaster collaborated on?

They have worked on 2 movies together! Their first movie together was 10 (1979) while their highest rated movie together was Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991). They have not worked together since Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991).