Easter egg: Once you're in the Main Menu, highlight the option where it says "Don't watch this". Then, using the directional arrows, press Down, and then Down again. You'll notice the pointer on the screen will dissappear. Then, press the Select button on your remote. Watch this AFTER seeing the whole movie, otherwise it won't have an effect on you.
Easter egg: On the Main Menu, when Scooby-Doo is startled by the ghost and he drops the Scooby Snack in his mouth, highlight it and then press Enter. This will access a short featurette on how it rained on set, during filming. Also, on the Special Features' second page, hit left on your remote and the sign with "Zoinks" under it will light up, then hit Enter.
Easter egg: On the three-disc special edition, there are 3 hidden features. On Disc 2, enter the 'Production' menu, then highlight main menu and press right to highlight a hidden symbol. On the same disc, in 'Pre-Production', go into 'Prep', highlight 'Safe Cracking School' and press right. On Disc 3, go to the fourth page of 'Visual Effects', highlight 'CGI Propane Tank' and press right.
Easter egg: On Disc 2, go to the Chamber Challenge in Activities and the narrator says something about a secret passage. Well, at the start instead of clicking the center forward arrow, be quick and press 'LEFT' on your remote, then it reveals the secret passage. On the U.S. release press 'LEFT' and then press 'UP' and again it shows the secret passage, bypassing the questions.
Easter egg: Take the paper DVD cover out of the plastic sleeve and you will see four numbers. Go to interactive mode, enter this number and you will have access to the entire movie from the film-makers view, including deleted scenes.