Michael Cole's title card has his name misspelled as 'Micheal Cole'.
Velma's map refers to a landmark as both "Marauders Mountain" and "Marauder's Mountain."
Shaggy says he's never driven a vehicle before, but he has driven the Mystery Machine frequently within the straight-to-DVD movie series. (In the "Fredless" Scooby productions in the mid 1980s, he was the prime driver of the van, but that appears to be a different continuity.)