YMMV / The Flintstones in Viva Rock Vegas

• Hilarious in Hindsight: During their double date at the amusement park, they see a sign for Jurassic Park the Ride and dismiss it as uninteresting because dinosaurs are commonplace in Bedrock. A plot point of Jurassic World is the fact the park starts losing customers once the novelty factor wears off and the park's owner orders new kinds of dinosaurs because of it.
• Ho Yay: When the Great Gazoo comes to Earth, planning to observe human mating rituals, he expects Fred and Barney to be his subjects, even telling them to "get on with it" when he sees them sharing a bed. Barney doesn't even seem that reluctant about it. Talk about a gay old time...
• Nightmare Fuel: The movie has some surprising scary moments due to their attempts to adapt the cartoonish aspects of the show via special effects to make them more realistic instead makes them look terrifying instead.
  • The Great Gazoo and his ilk in the movie. While their appearances are more natural in animation, their realistic green human faces stuck on tiny bodies made to look like the original depiction comes across as very unnerving to look at. Not helped that The Great Gazoo appears and disappears suddenly at random- leading to unintentional Jump Scare moments.
  • Fred's eyes suddenly CGI bulging eyes that take on a slot machine effect when he talks about Rock Vegas and it comes out of nowhere.
• Retroactive Recognition:
  • A very young Kristen Stewart made a cameo as a ring toss girl in the carnival portion of the plot.
  • A pre-Harold & Kumar John Cho as the valet who parks the cars at the birthday party.
  • King Robert Baratheon as Fred.
• Sequelitis: The first film was divisive but did well enough with the public and the series' fans because at the least it was pretty close to the cartoon and had a likeable enough cast to make it work. The prequel however fell into it as many weren't interested in a prequel story, the plot had the opposite problem of the first with most for being too kiddie and adding the Great Gazoo (whom is a bit of a Scrappy with Flintstone fans). Also, the lead cast being made up of D-list actors didn't help things.
• Took the Bad Film Seriously: Dodgy accent aside, Mark Addy gives it his all in mimicking Fred's mannerisms to a T. In the DVD Commentary, Addy claims he not only extensively researched footage from the show, but also Fred's inspiration Jackie Gleason.^note Which clearly paid off since Addy would later be cast as Gleason in a CBS biopic though he had to drop out due to scheduling conflicts, leading him to be replaced with Brad Garrett.
• Unintentional Uncanny Valley: Alan Cumming's portrayal of the Great Gazoo can come off as a bit creepy and weird. Imagine a realistic human face, painted green and stuck onto a cartoonishly tiny body.
  • As mentioned above, Fred's sudden Wing Ding Eyes bulging out and taking on the traits of a slot machine. What normally works in traditional animation suddenly takes on an unnerving aspect in live-action.