context: In Coolsville, Ohio, four teenagers are involved in a fight on the school bus, including the damage to Vice Principal Grimes' new car and are sent to detention in the library. Norville "Shaggy" Rogers is a clumsy, geeky outcast, who tried to smuggle his dog Scooby-Doo onto the bus; Fred Jones is quarterback of the football team; Velma Dinkley is a science nerd; and Daphne Blake is in the drama club. They bond somewhat over a shared interest in mysteries, but quickly get on each other's nerves. While in the library for detention, two ghosts appear and chase them to the gym where a pep rally is going on. A third ghost, The Specter appears, causing the lights in the building to flicker. He starts telling everyone to leave. The stamp-collecting Principal Deedle decides to close the school, but Vice Principal Grimes deems it a prank and suspends the quartet as he refuses to believe that there are ghosts in the school.
  The gang tries to clear their names by investigating the ghosts at the school, which leads to Grimes expelling them and threatening to have them arrested if they're caught sneaking into the school again. Further investigation, in disguise at the school, makes them think Grimes is their prime suspect. Searching at night at Grimes' house leads them to information about a time capsule. The ghosts attack again, and the teens are knocked out. The Specter, keeping Scooby and Grimes as prisoners, forces the gang to search underground for the time capsule. Unable to find the capsule, they trick the Specter into coming down to carry the capsule out of the hole, but the plan backfires when they try to lock him up in a flooded room, and the Specter acquires the capsule.
  Stealing the capsule back, the gang uses a book of spells to banish the ghosts. Scooby manages to break free of his restraints and arrives just in time to subdue the Specter, who turns out to be Principal Deedle. The principal reveals that a stamp misprint was hidden within the time capsule, something that would have been worth a fortune. As the exposed Deedle is fired from his job and is sent to prison for his actions, the group is publicly congratulated (and un-expelled) by Grimes (who becomes the new Principal). In the film's ending, the group decide to stay together and solve mysteries, and they head off to "investigate some strange goings-on at the Coolsville museum", a hint to the very first episode of Scooby Doo, and their very first case, The Black Knight Ghost.
question: What is the dog's name?
answer: Scooby-Doo