Scooby Doo has always been cheesy fun, but it had an important core message: seemingly supernatural occurrences have rational (if campy) explanations. It's critical to note that the Gang never solves the mystery in this movie— supernatural elements remain unexplained in the end. In contrast with the Scooby Doo tradition; dragons, ghosts, and "spirits" are presented as real. Definitely not for fans of Scooby Doo.
This movie is a decent movie that uses the same formula as all the other lame direct-to-dvd Scooby Doo movies. Hoewver, this one is more violent than the other ones as there is actual swords used. I only rated this 3-stars as there's more violence, but no blood or gore.