Mystery Inc. has cracked the case to top all cases! TheyÔÇÖve tracked down Coco Diablo, the head of a notorious costume crime syndicate. With Coco and her kitty in prison, Mystery Inc. thinks that they can finally enjoy a break. Wrong! Suddenly, menacing doppelg├ñnger ghosts of the Scooby crew and favorite classic foes show up in Coolsville to threaten Halloween. Now itÔÇÖs up to the meddling kids to unmask the latest scoundrel and save Halloween!
