Cast[]
- Duke as R. L. Stine
- Snowball as Slappy the Dummy
- Max as Zach Cooper
- Gidget as Hannah Stine
- Chloe as Gale Cooper
- David (from All Dogs Go to Heaven 2) as Champ
- Gru (from Despicable Me) as Coach Carr
- Max and Duke's Owner as Lorraine Cooper
- Anne-Marie (from All Dogs Go to Heaven) as Taylor
- Buddy as Davidson
- E.B. (from HOP) as Officer Stevens
- Hank (from Journey 2: The Mysterious Island) as Principal Garrison
- Silas Ramsbotttom (from Despicable Me 2) as Mr. Black
- Mr. O'Hare (from Dr. Seuss' The Lorax) as Monster #16
- Mel as Werewolf