A Gaggle of Galloping Ghosts - S1-E11
Plot hole: There's no way the gypsy man could have shifted between the three forms of a Dracula look-alike, werewolf, and zombie man so quickly all over the place.
Scooby-Doo, Where Are You! (1969)
1 plot hole in A Gaggle of Galloping Ghosts - chronological order
Starring: Frank Welker, Don Messick, Casey Kasem, Nicole Jaffe
Continuity mistake: Scooby finds a clump of ape hair stuck in the wine cask. It cuts to the gang, then back to the cask as they walk up and suddenly the clump of hair is twice as thick. (00:16:45)
Shaggy: Scooby-Snacks won't work on me this time.
Daphne: Would you do it for a Shaggy-Snack? A little something I whipped up.
Shaggy: Huh? A Shaggy-Snack?
Daphne: Yes, it's a pot-pie, with pizza crust, anchovies, pepperoni, cherries, all in a thick chocolate sauce.
Shaggy: Hahahaha! I'll do it! I'll do it!
Scooby's Night With a Frozen Fright - S2-E4
Question: Is Daphne holding her breath when the gang is in the tank underwater?