Scooby-Doo! Abracadabra-Doo is a 2010 feature film based on the classic Hanna-Barbera cartoon series about Fred, Daphne, and the rest of the lovable young detectives who solve the world's greatest mysteries with their loyal dog, Scooby-Doo. This film, the fourteenth in the popular feature-length series, follows the gang on an all-new mystery adventure. This time, they're headed to the Whirlen Merlin Magic Academy, where Velma's younger sister has been studying. When the gang learns that a giant gryphon has supposedly been terrorizing the school's staff and students, they suspect foul-play is afoot and start investigating the ancient Irish castle that houses the school. As Shaggy and Velma's sister Madelyn discover their true feelings for each other, the gang realizes there's some real evil magic going on at the school. Scooby-Doo! Abracadabra-Doo is an exciting animated film, featuring voice acting by Frank Welker, Matthew Lillard, Mindy Cohn, and Grey DeLisle.