Watch Scooby-Doo! Abracadabra-Doo (2009) HD Full Movie Free on SolarMovie. Watch Scooby-Doo! Abracadabra-Doo (2009) online free. The gang goes on a trip to check on Velma's younger sister, Madelyn. She's been studying stage magic...The gang goes on a trip to check on Velma's younger sister, Madelyn. She's been studying stage magic at the Whirlen Merlin Magic Academy, where apparently there have been sightings of a giant griffin. The gang decides to investigate.