Cast
Version 1
- Kirby as Gumball
- Tuff as Darwin
- Tiff as Anais
- Sir Ebrum as Richard
- Lady Like as Nicole
- Pinkie Pie (from My Little Pony) as Penny
- Apple Bloom (from My Little Pony) as Penny's Sister
- Applejack (from My Little Pony) as Mrs. Fitzgerald
- Big McIntosh (from My Little Pony) as Patrick
- Tokkori as Banana Joe
- Knuckle Joe as Tobias
- Shadow Kirby as Bobert
- King Dedede as Mr. Robinson
- Gengu as Juke
- Sirica as Carrie
- Hana as Rachel
- Tuggle as Leslie
- Buttercup as Carmen
- Honey as Teri
- Queen Chrysalis (from My Little Pony) as Miss Simian
- Chef Kawasaki as Alan
- Mayor Len Blustergas as Principal Brown
Version 2
- Kirby as Gumball
- Tiff as Carrie
- Tuff as Darwin
- Honey as Anais
- Sir Ebrum as Richard
- Lady Like as Nicole
- Sirica as Penny
- Knuckle Joe as Tobias
- Tokkori as Banana Joe
- Meta Knight as Leslie
- King Dedede as Mr. Robinson