2009 video game
Story:
In a swamp, Velma arrives at the Mystery Inc. Clubhouse and announcing the gang the newspaper that tells them the food festival opens at Keystone Castle. Shaggy and Scooby were thrilled to go there, but Daphne reminds them that she promise to help her cousin to win the High School Musical talent contest, much to Shaggy and Scooby’s disappointment. Fred then cheers them up by telling them the school has a cafeteria in the state. Shaggy and Scooby likes hearing that and agrees to help, so they are ready to go to school first then the castle.
At St. Louis High School, in the assembly hall, Anna was performing her rehearsal by her drama teacher named Ms. Hilken. Suddenly, she heard an evil menacing laugh echo across the hall and then notice that Ms. Hilken disappears. Then she look up and saw the evil phantom, kneeling above the stage. He flew down and started chasing after Anna.
Meanwhile, when the gang arrived at the school by their Mystery Machine, they prepared to split up. Shaggy and Scooby wondered around the garden and playground and on their way to find Anna and cafeteria, a place where they can fuel up to help Anna to win the rehearsal. Along the way, Shaggy and Scooby saw the Scooby Medallion, which is worth 500 Scooby Snacks, hovering about the statue of the dead phantom. They climbed up the statue and reached for the medallion. After they got the medallion and climbed back down the statue, they heard a noise from the bushes. It was Anna wondering around. Anna was surprised to see them and tells them that the phantom has disturbed the contest. Shaggy and Scooby comfort her that they will help her after they will find the cafeteria. When they reached the cafeteria, they found that the food was down the tunnel inside the vent. Shaggy was ready to give up, but Scooby refuses and dashes inside the vent. Disappointed, Shaggy was feeling deserted.
Meanwhile, Fred and Velma turned up the generator inside the power shed and entered the baseball field. Then Velma spotted her techno-computer to turn on the lights. Then they have found their first clue: the missing glove of the phantom! When they wondered around, they met with Coach Hayes, the practical school sports coach. Fred and Velma asks them about the phantom lurking around this school. Coach tells them to ask Ms. Hilken where she was every time the phantom appeared. When coach left, a group of skeletons appeared. Fred and Velma battled them hand-to-hand combat. When they finished, they walked up to the school building. Above the ground, Scooby pops out of the vent met up with Daphne, who climbs across the pole. While they entered inside the school building, and through the hall and up the stairs, they faced the Invisible Musketeers and the skeletons. Along the way, they found the witches and began fighting them off and down. When they finished, Shaggy, Fred and Velma appeared and the gang regrouped. Shaggy decided that it’s time for him and Scooby to look for clues together, which impresses Velma.