The Flintstones: On the Rocks is a television animated movie based on the 1960 series The Flintstones. The movie aired on November 3, 2001 on Cartoon Network in the United States.
Fred and Wilma's marriage is in serious jeopardy. After years of Wilma putting up with her husband's lazy, self-centered loitering, she hopes that a second honeymoon in Rockapulco (a gift from the equally concerned Rubbles) will finally restore the passion in the relationship; Fred, in the meantime, looks at the idea as another excuse for a personal vacation and takes it for granted. Meanwhile, a professional thief succeeds in acquiring a rare diamond, but he loses possession of it when his handbag ends up getting switched with Wilma's handbag, forcing the thief to woo the frustrated Mrs. Flintstone in an effort to reclaim the diamond, which follows up to leading a worried Fred to reevaluate his own conduct and feelings towards Wilma before he "loses her" for good. The two eventually discover the thief's true purpose and reunite to save the day and restore their love.
- Jeff Bergman as Fred Flintstone
- Tress MacNeille as Wilma Flintstone
- Kevin Michael Richardson as Barney Rubble, Hector and jewel guard
- Grey DeLisle as Betty Rubble
- Jeff Bennett as Xavier the Villain
- Joey Altruda as Stoney Altruda
- John Kassir as concierge, bartender, border guard and florist
- Tom Kenny as bellboy, mammoth vendor, bed monkey and bowling announcer
- Zelda Rubenstein as a psychiatrist
- John Stephenson as Mr. Slate and an old man
- Frank Welker as Dino, monkey and elevator operator
- Carmen Twillie as a tenor singer
- Oren Waters as a baritone singer
- Willie Wheaton as a bass singer
- Character Designs by Craig Kellman
- Background Designs by Jim Worthy
- Background Color by Don Watson and Tim Maloney
- Animation Direction by Robert Alvarez
- This movie has not been officially released on Home Media since its original airdate, the only way to view the movie is by downloading a copy from torrent sites.
- This is the final time any original voice actors would work on a Flintstones project.
- Chris Savino, creator of Nickelodeon's The Loud House, co-wrote and co-directed on this film.
- On the Rocks is infamous for containing more adult oriented themes, which is why it has yet to see an official release by Cartoon Network.