 | Bettina Bush als Rainbow Brite (voice) (as Bettina) |
 | Pat Fraley als Lurky / On-X / Buddy Blue / Dog / Guard / Spectran / Slurthie / Glitterbot (voice) (as Patrick Fraley) |
 | Peter Cullen als Murky Dismal / Castle Monster / Glitterbot / Guard / Skydancer / Slurthie (voice) |
 | Robbie Lee als Twink / Shy Violet / Indigo / La La Orange / Spectran / Sprites (voice) |
 | Andre Stojka als Starlite / Wizard / Spectran (voice) |
 | David Mendenhall als Krys (voice) |
 | Rhonda Aldrich als The Princess / The Creature (voice) |
 | Les Tremayne als Orin / Bombo / TV announcer (voice) |
 | Mona Marshall als Red Butler / Witch / Spectran / Castle Creature / Patty O'Green / Canary Yellow (voice) |
 | Jonathan Harris als Count Blogg (voice) |
| Marissa Mendenhall als Stormy (voice) |
 | Scott Menville als Brian (voice) |
 | Charlie Adler als Popo (voice) |
| David Workman als Sargeant Zombo (voice) |
| Bernard Deyriès | Director |
| Kimio Yabuki | Director |
| Jean Chalopin | Screenstory |
| Howard R. Cohen | Screenstory |
| Shuki Levy | Original Music Composer |
| Haim Saban | Original Music Composer |
| Victor Villegas | Associate Producer |
| Alan Lee | Associate Producer |
| Tetsuo Katayama | Producer |
| Andy Heyward | Executive Producer |
| Jean Chalopin | Executive Producer |
| Hirokata Takahashi | Director of Photography |
| Yutaka Chikura | Editor |
| Marsha Goodman | Casting |
| Ginny McSwain | Casting |
| Rich Rudish | Art Direction |
| Jean Chalopin | Scenario Writer |
| Howard R. Cohen | Scenario Writer |
