After one of the gang's biggest mysteries, they realize that they no longer want the roles that they fell into. They are later requested separately to help solve a mystery on Spooky Island. Teenagers are going there normal but when they leave they're zombie-ish. The gang reunites at the airport, and arrive to Spooky Island together. Freddy, Daphne and Velma end up losing their spirits and being possessed. Shaggy helps them get back their spirits. Scooby is held captive so that he can be sacraficed for his "pure" soul. Once Scooby finds out that being sacraficed is a bad thing, thanks to Shaggy, he and the gang find out that Scrappy is behind the whole thing. Scrappy had put Rowan Atkinson's character into a prison and dressed up in a costume to look like him. They defeat Scrappy and, presumably, go onto their next mystery
Continuity mistake: In the beginning of the movie during the skateboard scene with Shaggy and Scooby riding along the conveyor belt, Scooby grabs a hook and both Shaggy and Scooby jump off of the skateboard. You see the skateboard falling off the conveyor belt, but in the next scene it is on the conveyor belt and being crushed. (00:03:20)
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