Audie Harrison

"Mystery Inc. just cracked the biggest case of all! Scooby-Doo and his pals have tracked down Coco Diablo, the head of the notorious costumed crime syndicate that includes the Black Knight, Space Kook and the Ghost Diver. With Coco and her kitty in prison, the gang can finally enjoy a break, right? Wrong! Menacing doppelgangers and classic foes show up in Coolsville, threatening Halloween, so it's up to the meddling kids and their unlikely new partner...