De fantasievolle June ontdekt een pretpark genaamd Wonderland, dat verborgen zit in het bos. Het park beschikt over leuke glijbanen en pratende dieren. June ontdekt al snel dat het park uit haar eigen fantasie is ontsproten en dat ze de enige hoop is, samen met de dieren, om deze magische plek te redden.
| Visual Effects | Betsy Bauer | Visual Development |
| Writing | Russ Edmonds | Story Artist |
| Editing | Darren T. Holmes | Additional Editing |
| Art | David Colman | Storyboard Artist |
| Writing | Mark Dindal | Story Artist |
| Visual Effects | Peter Chan | Visual Development |
| Art | Christopher Appelhams | Storyboard Artist |
| Production | Alfonso Casado Diez | Production Assistant |
| Production | Matteo Veglia | Production Assistant |
| Production | Ignacio Pérez Dolset | Producer |
| Sound | Steven Price | Original Music Composer |
| Production | Josh Appelbaum | Producer |
| Production | Ben Rosenblatt | Co-Producer |
| Production | André Nemec | Producer |
| Production | Kendra Haaland | Producer |
| Production | Karen Rosenfelt | Executive Producer |
| Production | Don Hahn | Executive Producer |
| Production | Alice Dewey | Co-Producer |
| Production | Geoffrey Stott | Associate Producer |
| Editing | Edie Ichioka | Editor |
| Production | Alonzo Ruvalcaba | Associate Producer |
| Writing | Robert Gordon | Story |
| Writing | André Nemec | Story |
| Writing | Josh Appelbaum | Story |
| Writing | Josh Appelbaum | Screenplay |
| Writing | André Nemec | Screenplay |
| Art | Mingjue Helen Chen | Art Direction |
| Art | Lou Romano | Art Direction |
| Crew | Juan García Gonzalez | Cinematography |
| Art | Fred Warter | Production Design |
| Production | Margery Simkin | Casting |
| Production | Aaron Dem | Co-Producer |
| Production | Connie Nartonis Thompson | Associate Producer |
| Production | Lorien McKenna | Associate Producer |
| Writing | Jørgen Klubien | Story Artist |
| Directing | Dylan Brown | Director |
