Velma learns the key ingredient to making monsters is a fictional substance called 'randomonium'. Shaggy and Scooby sneak into the nightclub, the 'Faux Ghost', where many of the convicted criminals they put away hang out, including Wickles who claims he has reformed from his criminal ways but quickly they are recognized and thrown out. Daphne fends the knight off until the gang can escape. Fred, Daphne and Velma find an instruction manual on how to create monsters while Shaggy and Scooby are chased by the reanimated Black Knight but not before finding a note reading 'Faux Ghost tonite' which they take as a clue. The gang travel to Wickles' mansion where they find mysterious green footprints like the scale leading to the library. They at first suspect their old enemy Jonathon Jacobo ( Tim Blake Nelson), who was the original creator of the Pterodactyl Ghost and knew how to create real monsters and bring them to life, but then news breaks out to the gang that Jacobo has drowned during an attempted escape from prison, so the gang guess Jeremiah Wickles ( Peter Boyle), their first foe and the Black Knight Ghost's portrayer, and Jacobo's roommate in prison, is responsible. The gang conclude one of their old enemies is the masked man wanting revenge. Velma finds a pterodactyl scale and analyses it, confirming it to be real. Heather Jasper-Howe ( Alicia Silverstone), a journalist, starts a smear campaign against the gang to discredit them, mainly stemming from a personal feud with Daphne. He escapes with his quarry and two monster costumes the Black Knight Ghost and the 10,000 Volt Ghost. However, the celebrations are cut short when the reanimated Pterodactyl Ghost attacks, controlled by the Evil Masked Figure, who boldly declares that Mystery Inc. ( Fred, Daphne, Velma, Shaggy and Scooby-Doo) is attending the grand opening of the Coolsonian Criminology Museum, the premiere exhibit displaying the monster costumes of criminals they dealt with in past cases. The film was released on Mato generally unfavorable reviews, and grossed considerably less at the box office than its predecessor. Series newcomers include Seth Green, Tim Blake Nelson, Peter Boyle, and Alicia Silverstone who appear in supporting roles. as Fred, Sarah Michelle Gellar as Daphne, Matthew Lillard as Shaggy, Linda Cardellini as Velma, and Neil Fanning as the voice of title protagonist Scooby-Doo.

The returning cast features Freddie Prinze Jr. Based on the 1969-71 animated television series, Scooby-Doo, it is the second (chronologically, the fourth and final) installment in the Scooby-Doo live-action film series, and a sequel to 2002's Scooby-Doo. Scooby-Doo 2: Monsters Unleashed (also known as Scooby 2, Scooby-Doo 2 or Scooby-Doo! Monsters Unleashed) is a 2004 comedy horror film directed by Raja Gosnell, written by James Gunn and released by Warner Bros.

Scooby doo 2 monsters unleashed dance