How many movies have Franca Lumachi and Iginio Straffi collaborated on?

They have worked on 2 movies together! Their first movie together was Winx Club: The Secret of the Lost Kingdom (2007) while their highest rated movie together was Winx Club: The Mystery of the Abyss (2014). They have not worked together since Winx Club: The Mystery of the Abyss (2014).