Cast[]
- Max as Arthur
- Anne-Marie (from All Dogs Go to Heaven) as DW
- Gru (from Despicable Me) as Mr. Read
- Chloe as Mrs. Read
- Sweet Pea as Pal
- David (from All Dogs Go to Heaven 2) as Buster
- Gidget as Francine
- Max and Duke's Owner as Muffy
- Buddy as Brain
- E.B. (from HOP) as Binky
- Hank (from Journey 2: The Mysterious Island) as George
- Duke as Mr. Ratburn
- Tiberius as Mr. Haney
- Pops as Grandpa Dave
- Snowball as Rattles
- The Once-ler's Mom (from Dr. Seuss' The Lorax) as Molly