When Shaggy and Scooby walk into the kitchen, in the ride, and Shaggy says "lights, camera, action." He walks by a camera on a tripod pretending that it is supposed to be there. But a few seconds later, we see a shot of Shaggy coming from that exact angle, it is obviously being used to film the movie.

The voice of Scrappy was done by Scott Innes, who voices Scooby-Doo and others in the recent cartoons (since 1998).

When Shaggy looks out into the cavern, he looks like he is about to cry, for no reason at all. This is because there was a scene directly before it in which Daphne's spirit thing was sucked out and she turned into a monster, which was eventually cut because it was too scary.

Many Harry Potter fans went to see the film just to see the trailer for "Harry Potter and the Chamber of Secrets" - the first time it was ever shown.