- Box Office Bomb: Only made about $33,000 thanks to MGM acting as if it never existed. It's one of the biggest animated movie bombs in history, rivaling that of Delgo and A Troll in Central Park.
- Creator Killer: Barely averted. Nelvana almost went bankrupt until the runaway success of The Care Bears Movie saved them.
- Executive Meddling: Before releasing the film to US theaters, MGM completely redubbed Omar's voice, added an Opening Scroll explaining the animalistic appearance of the characters, made some minor changes to the ending, and changed the title to "Ring of Power". Never mind that the only ring in the entire film appears, serves its purpose, and dutifully vanishes within the first 10 minutes.
- Fake American: British actor Chris Wiggins voices the Brooklyn-accented Toad.
- Invisible Advertising: MGM never promoted its theatrical or home video releases, attributing to how little the movie made in sales.
- Keep Circulating the Tapes: Because of the film's small budget, no soundtrack album was ever even planned, let alone released, and only a handful of the songs have ever gotten properly released on the artists' respective albums. Also, the Canadian cut of the film, featuring Omar's original voice actor, has never been officially released in the US.
- Misattributed Movie: The movie picked up its cult following via bootleg videotapes that were circulated at comic book conventions, but these tapes stated on the cover that Ralph Bakshi was the director, which he was not. Might also be an All Animation Is Disney-esque case of "All Adult-Oriented Animation is Ralph Bakshi", since Rock & Rule contains absolutely none of Bakshi's trademarks or style except for their shared target audience.
- Non-Singing Voice:
- Playing Against Type: An example applying to a whole studio. It's so odd to see Nelvana, the same studio that would later become famous for making children's productions like Care Bears, Little Bear, and Franklin, making something as mature as this film.
- Recycled Script: The plot is heavily derived from a previous Nelvana product The Devil and Daniel Mouse, which was essentially an animated, kid-friendly adaption of the story of Doctor Faustus.
- Screwed by the Network: MGM underwent a management reshuffling following its merger with United Artists, and the new executives were apparently not thrilled with Rock & Rule. Consequently, MGM canceled the film's North American release shortly after it was completed, and opted to give it a limited release in Boston, Massachusetts.
- Talking to Himself: Animator Greg Duffell voices both Stretch and one of Mok's henchmen Zip.
- What Could Have Been: Howie Mandel was originally going to voice Stretch, but he moved to Los Angeles before recording could begin.
Trivia / Rock & Rule