Trailer
 | Dean Wendt as Barney (voice) |
 | Carey Stinson as Barney |
 | Julie Johnson as Baby Bop (voice) |
| Jeff Ayers as Baby Bop |
 | Montana Tucker as Serena the Mermaid |
| Patty Wirtz as BJ (voice) |
| Alexandrea Hairston as Princess Zulica (Zulie) |
| Kyle Nelson as BJ |
| Dylan Crowley as Alex |
 | Carina Conti as Megan |
| Jennifer Skidmore as Lily The Librarian |
| Robert Sky McDougall as Maynard The Magician |
| Nicholas J. Leinbach as Horrible Harry The Giant |
| Desi Romero as King |
 | Nicola Lambo as Queen |
| Olgia Campbell as Matilda The Hun |
| Tonya Thompson as Mrs. Wilson |
