Features reanimated monsters from the original series.
When Shaggy and Scooby decide to be 'real detectives' they tell the others of the gang to turn the investigation up to an 11, a refernece to Nigel's famous line.
A flashback scene to the 'gang's childhood is used, much like how the first movie had a reference to the Scooby and Scrappy show.
When Shaggy goes out through a door, and he find out that the door is attached to a wall several feet above the ground, it's similar to a scene with John Murdoch.
Shaggy [to Matthew Lillard]: "If you, like, goof on me in the sequel, I'm coming after ya!"
poster in movie theater
Open reference by a character
Menioned as a sequel to the live-action adaptation of Scooby Doo.
Alex is talking with Helen at work and mentions this movie
Title mentioned while introducing Sarah Michelle Gellar
The sequel is mention
says this movie sucked
reviewed + footage used
VHS/DVD release reviewed + footage used
"What's Your Middle Name" segment
movie is reviewed
When the "Those of who we do not speak" are unmasked