If you look closely, you can see that the Mystery Machine's license plate is "195 343".
This movie marks the first appearence of Velma's young sister, Madelyn, in the Scooby-Doo franchise.
The animation is now in a different format, with a darker, more realistic look similar to Scooby-Doo on Zombie Island, and the characters are now in their original outfits and designs from the 1969 series.
This is one of the only Scooby Doo movies to not feature the villain (at both the beginning and the ending of the film) saying 'And I would've gotten away with it too, if it weren't for you meddling kids and that darn mutt!'
When in the library, searching for clues as to how to stop the gryphon, the gang and Madelyn gathers around in a way similar to the scene in the first episode of "Scooby-Doo Where Are You?", "What a Night for a Knight", where the gang finds out about the legend of the Black Knight, which has also become one of the gang's best known trademark images.