Does anyone remember this movie? It was released in 1991, just a year or so before the dinosaur-themed scripts for Super Mario Bros. were starting to be written.
According to Wikipedia, the plot is as follows:
The story involves a trio of teenagers, named Timmy, Jamie and Mick, who enjoy watching their favorite TV show which features anthropomorphic dinosaurs. Wanting to watch it on a better screen, Timmy, the youngest of the three, suggests that they try watching it on his father's screen in his laboratory. The moment they turn it on, a vortex sucks the three into the TV screen, and into their favorite show. Upon entering the new world, the trio comes across a flightless Dimorphodon named Forry. Although reluctant at first to help them, his knowledge of Dinosaur City proves useful, as he guides the three to Tar Town, where they join up with Rex and Tops, two dinosaur freedom fighters willing to ignite a revolution against the villain, Mr. Big, and his caveman henchmen, "The Rockies".
From memory, it's almost sort of a cross between TRON and Super Mario Bros. The Movie in that the adventure takes place in a vaguely cyber-punk dinosaur world that exists within a digital universe.
I haven't seen it in some time, but the concept sounds fun while the costume designs appear to be at least on par with the Teenage Mutant Ninja Turtle films. Might be worth a revisit as well.