I saw this like in November or something when it premiered on Cartoon Network. It is a Cartoon Network original movie from 2001. It is pretty funny, and it is sort of a R Rated Flintstones. The animation is a copy of the original series and so is the sounds from the show. I actually liked it.

The Flintstones on the Rocks
Saturday Mar 9 7:00 PM Cartoon Net
Sunday Mar 10 10:00 AM Cartoon Net
120 min.
The Flintstones and Rubbles vacation in Rockapulco to celebrate Fred and Wilma's wedding anniversary. But the romantic spark fizzles until they become pawns in a jewel caper that rekindles the flame. .
Category: Movie, Cartoons & Animation
Release Year: 2001

ALSO...

Don Knotts and many other Scooby Movie guest stars will be talking to Scooby to tell him what a great deal it was working with him in this special:

The 1st 13th Annual Cartoon Network
Fancy Anvils Award Show Program
Special...Live!…In Stereo
Saturday, March 23, 7-9 p.m. (e/p)

Cartoon Network jumps into the awards season fray with the 1st 13th Annual Fancy Anvils Award Show Program Special…Live!…In Stereo.

Host Johnny Bravo will be joined during the award ceremony by a cavalcade of stars, including Debbie Allen, Sandy Duncan, Elmer Fudd and Fred Flintstone.

The ultimate parody of the "kudocast," the Fancy Anvils will gather the world's top animated stars at the Hanna-Barbera Pavilion for an unforgettable night honoring outstanding achievements in cartoon excellence.

The program will feature red-carpet arrivals, peculiar awards categories, rambling speeches, celebrity cameos, sweeping crane shots and the presentation of the Lifetime Achievement award to the hardest working dog in show business, Scooby-Doo. Also among the evening's highlights: Debbie Allen will present a tribute to dance as seen in cartoons through years.

Vote on CartoonNetwork.com starting March 11.
It will air Sat March 23rd at 7p-9p