Mystery Solvers Unite!

Mystery Solvers Unite! is an animated crossover film produced by Warner Animation Group as the tenth film in the Warner Bros. Hanna-Barberaverse. It is a crossover featuring various Hanna-Barbera characters from Scooby-Doo, Tom & Jerry, Dynomutt, Dog Wonder, Captain Caveman and the Teen Angels, Speed Buggy, Jabberjaw, The Jetsons and The Flintstones.

Synopsis
When we last left George Jetson, he went back in time to retrieve his old friend Rosie the Robot who ran away from the family. But when he finally reached his destination, he was shocked at what he saw: people running in terror as Rosie battled and defeated the Blue Falcon. After narrowly escaping trouble with help from robotic rover Dynomutt, Jetson races against the clock to bring his old friend back home. Joining him on his quest are Great Dane detective Scooby-Doo, air-breathing shark Jabberjaw and prehistoric superhero Captain Caveman. Their mission is to find out Rosie's motives and save the town--and possibly the world--from danger. Will they be victorious? And just what are Tom, Jerry and Speed Buggy up to?

Cast

 * Frank Welker as Scooby-Doo, Dynomutt, Jabberjaw, Tom, Jerry and Speed Buggy
 * Jim Cummings as Captain Caveman
 * Jeff Bergman as George Jetson and Fred Flintstone
 * Ben Affleck as the Blue Falcon
 * Andy Serkis as Mr. Hyde
 * Tress MacNeille as Rosie the Robot

Trivia

 * Fred Flintstone has a cameo in the film.
 * Tom, Jerry and Speed Buggy have minor roles in the film, going undercover as their own separate team.
 * It is revealed that Rosie was forced to work as Mr. Hyde's slave because she didn't want to be destroyed, but at the same time she wasn't ready to go back home because she wanted to be more than a maid.
 * Mr. Hyde was revealed as the main villain and Rosie was really a pawn.