How many movies have Debi Derryberry and Salli Saffioti acted in together?

They have worked on 15 movies together! Their first movie together was Monster High: Fright On! (2011) while their highest rated movie together was Monster High: Why Do Ghouls Fall in Love? (2012). They have not worked together since Spycies (2020). They are most known for their animation films together.