Thanks for the Dragons
A big 90210 thank you for everyone who helped think of dragon movies. (I don't know how I could forget Shrek--how'd my kids forget?
The animators who made The Hobbit and The Last Unicorn also made a movie based on The Dragon and the George called A Flight of Dragons. It's not spectacular but it does feature a boatload of dragons.
My new theory is that my kids didn't think the Scooby Doo dragon was a dinosaur because they don't recognize dragons but because the Scooby gang was vacationing in Scotland in that episode. That was probably the only time any toons have visited Scotland and not seen the dinosaur-like Nessie.
My five-year old is convinced that Nessie is real but Bigfoot is fake because Scooby Doo says so.