Continuity mistake: When Velma and Fred are walking through the airport talking, you can see there is a girl with yellow pants walking in the opposite direction with another person. However, when you see the crowd around Daphne as she is complaining about how the system is so economy, you see that part of the crowd is the same girl with the yellow pants.
Revealing mistake: As Pamela Anderson comes crashing through the gates at the factory, the floor camera is knocked slightly.
Other mistake: When Scrappy pees on Daphne, you see Fred start yelling at Scrappy, but if you look at Fred's eyes, they are focusing on something else.
Other mistake: When the gang is in the mystery machine and Scrappy pees on Daphne and they kick Scrappy out of the car, from a distance the driver isn't Fred - it is someone with dark hair, not blonde.
Continuity mistake: Daphne wears three types of boots in the movie: 1) When she is wrestling with the blue costumed guy at the end, when she jumps over the railing to kick him, it goes to a close-up of her foot hitting him and the heel squishes in. (I'm assuming that this was done so as to not hurt the wrestler being hit with her foot. 2) Later, she kicks up and she is wearing pink flats. 3) In the rest of the film, she wears normal pink go-go boots with a solid heel.
Continuity mistake: When Fred and Daphne kiss at the end of the movie, you can see in the close-up that Fred has nothing on his back, but in the very next shot Daphne has her arms around him.
Revealing mistake: In the little clip at the end, Scooby Doo opens a jar of peppers and dumps them in his mouth. You can see that there should be more in the jar than the seven or so that fall into his mouth, but suddenly the jar is empty.
Audio problem: In the subtitles, watch when the monsters appear in the lobby, Scooby goes mental and yells out "AAH" or something. It says Shaggy says this, not Scooby.
Continuity mistake: At the start of the movie the mystery machine drives through the wall once they have caught the ghost and the front is all dented up. A few scenes later it's perfect again.
Continuity mistake: At the end Rowan Atkinson is released wearing dishevelled clothes, long hair and a beard. When Scrappy is placed on the helicopter, he's standing behind the gang, clean shaven and wearing the clothes he was wearing when the robot controlled version had Scrappy inside.
Suggested correction: Several hours have passed between these two scenes. So he had the chance to shave and put on clean clothes.
Revealing mistake: After the little Scooby-gang has crashed through a window after being chased by monsters they bounce upon an awning and you can see that the glass from the window is now paper.
Continuity mistake: When they all are driving in the Mystery Machine, Scrappy pees on Daphne, and gets kicked out of the car. When you see him get kicked out, his bag is on the ground. But if you look carefully, you can see that the bag is on the ground before they even open the door to throw Scrappy out.
Continuity mistake: Within the first few scenes, which are apparently on the exact same day, and even in the exact same hour, Daphene's dress changes styles. For example, when she steps off the plane, she is wearing a purple minidress, with a low collar. But, a couple of minutes later, her dress suddenly has a noticeable hem, and a weird decoration thing at the bottom of her slightly lower low collar.
Continuity mistake: During the "Spookapalooza," among the people behind Velma, one is holding a toy trident and the other is holding something else. A few shots later, what they were holding is now in the other person's hands.
Continuity mistake: When Daphne is fighting the demons in the hotel she has a square handbag. After all the drama ends and they awake the next morning on the beach Daphne has a handbag with round handles and a detailed front.
Continuity mistake: Throughout the whole movie, Velma's jumper continually changes from a polo neck to a regular sweatshirt.
Continuity mistake: The density of the monsters change during the movie. The first monster we see is so much lighter than Scooby that it gets catapulted hundreds of yards when Scooby falls from the bent tree. Later, the monsters are so heavy they crash through an awning that Scooby (and Shaggy, Daphne, and Mary Jane) had just bounced off of.
Continuity mistake: When Scooby-Doo is facing one of the monsters he bites the fingernails off its left hand, a moment later it lashes at him and the finger nails have grown back in perfect condition again.
Continuity mistake: After the scene where the gang has each other's voices, they are seen walking to the Voodoo man's house because they hear an explosion. Fred is holding Daphne's purple purse in the forest, then he isn't carrying it at the Voodoo man's house. Then in the next scene, Daphne has it back again.
Other mistake: The scene in the end where Shaggy and Scooby are daring each other to eat hot peppers, Shaggy puts a pepper on a slice of pizza and eats it. Look carefully, he actually doesn't eat the hot pepper on the pizza slice, but still somehow gets the hot taste.
