Mine Your Own Business - S1-E4
Continuity mistake: When Scooby holds up two apples while he is sitting in the trough, his nose changes colour to brown briefly.
Continuity mistake: In a full view of the Scooby and the gang in the Sheriff's office at the end of the episode, Velma is sitting on a chair and you can see there is nothing beside her, but after a quick cut of the Sheriff, we return to Velma and Shaggy and a filing cabinet has suddenly appeared.
Continuity mistake: When Shaggy asks the gasman if he has any wheels he can borrow, Shaggy is wearing his disguise kit. When we see him on the moped just a few seconds later, he is now back in his normal clothes.
Continuity mistake: In a shot of Fred, Daphne and Velma in the Mystery Machine, Fred announces that they are at Beach Boulevard and you can see that Velma has nothing on her head. But after a quick cut to the radar, we return to Velma and she is now wearing her earphones.
Continuity mistake: When Fred is standing by the slingshot, you can see Velma, Daphne and Shaggy are standing behind him, but in the next shot they have all disappeared.
Continuity mistake: When Scooby bites Shaggy to help him to pull the lever, Scooby's dog collar is blue, but a few seconds later the collar is red.
Continuity mistake: When Shaggy is running after the van after Scooby is captured, he is holding the cut-off lead in his left hand. When Shaggy approaches the man at the gas station, he no longer has the lead.
Continuity mistake: When the Witch Doctor opens the crate and Scooby walks out, you can see the dog tag on Scooby's collar has nothing on it, but in the next shot the letters "SD" have appeared.
Continuity mistake: When Shaggy is telling Fred about his encounter with the Ghost of Geronimo, look at the Mystery Machine behind them and you can see the additional equipment is missing.
Continuity mistake: When Shaggy takes off his bowler hat to catch the flying garbage, the spots on Scooby-Doo's back are missing.
Continuity mistake: When Fred and Daphne arrive at a temple screen, the top lavender strip on Daphne's skirt is missing.
Continuity mistake: When we see Fred holding the picture of Champion in the Mystery Machine, he is holding one sheet of paper. When we see a full view of the gang in the next shot, Fred is now holding two sheets.
Continuity mistake: When Scooby is in Buck Masters' office, he sees a pointer dog on top of a stand and then does an impression of it by pointing his finger and freezes. When the camera closes in on Scooby in the next shot, the stand has disappeared.
Continuity mistake: When Scooby Doo rushes back on to the beach and Shaggy asks him, "What's with you?", Scooby's eyebrows disappear briefly.
Continuity mistake: In the shot of Scooby Doo turning on the radio at the beach, his spots are missing.
Continuity mistake: When the Mystery Machine is driving down Beach Boulevard, you can see Fred and Daphne are sitting in the front seat. When Velma locates Scooby-Doo on the radar using the transmitter in his collar, we cut to the Mystery Machine and Fred and Daphne have now gone.
What the Hex is Going On? - S1-E6
Continuity mistake: Shaggy is seen holding a multiple folded piece of paper in a left side shot of The Mystery Machine, but the paper has disappeared in the next shot of the gang through the windshield.
Continuity mistake: The camera pans over the filming set and stops on the gang with Mr. Maxwell. There is a van behind them with the Ape Man movie poster on the side. The vinyl piece on the side of the van goes behind the poster and is lined up directly with the orange letters saying "EPI-CENTER FILM COMPANY." It then cuts to a close up of the poster and suddenly it has moved up on the vinyl and become smaller, lined up with the underside of "LOCATION No.2" (00:01:20)
Continuity mistake: The Ape Man breaks the rope bridge that Scooby is on and it begins to fall. But by the Ape Man, the stakes holding the broken ropes are still in the ground at his feet. Scooby falls down and lands on a root, which bounces him back up where he punches the Ape Man. The stakes and broken rope have vanished. (00:03:50)
Continuity mistake: After Candy and the stunt man quit the movie, Mr. Maxwell says he has to withdraw his job offer to the gang as it's too dangerous. As the gang is shown, Scooby is sitting in front of Shaggy and Fred. It cuts to a close up of him as he gets excited about this, and suddenly Fred and Shaggy have vanished. (00:06:10)
Chosen answer: A ghost wouldn't have to keep any food in the fridge - they don't need to eat. So it is one thing that proves the ghost is not a ghost.