How many movies have Debi Derryberry and Ted Zizik collaborated on?

They have worked on 7 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 Monster High: 13 Wishes (2013). They are most known for their animation films together.