The top mistakes in Scooby and Scrappy-Doo http://www.moviemistakes.com/tv4389 en Sat, 06 Sep 2008 05:55:20 +0000 65467 There is a "scarab alarm" when the blue scarab arrives, Shaggy even comments on hearing this. The problem is, The Blue Scarab is a comic book, so the villain and Shaggy wouldn't know what the Scarab alarm sounded like.