The plot is; Shaggy inherits a mansion from his late Uncle Beauregard (No last name given!), but when he, Scooby-Doo and Scrappy-Doo arrive the place turns out to be haunted. Shaggy also learns he's inherited a treasure hidden somewhere on the estate, but with guns, ghosts and gooney girls on his tail, it might be hard for him to even survive, much less find the treasure!
Good points: Scrappy-Doo. I'm sorry, he just plain wasn't annoying! He was smart, deductful and spunky. Sure, he's usually the most hated person ever on Scooby-Doo, but I liked him in this! It's about Shaggy! This guy usually gets just second billing, and half the merchandise as his canine companion. It's good to see him in the spotlight for once. Clever and funny. The Boo Brother were hilarious!
Bad points: Villain was too predictable. I got it almost immediately. Plot holes. Many many plot holes. Some of the funny jokes were overplayed (i.e; The scene where Shaggy convinces himself nothing's out to get him, but the viewers see that Billy and his sister are following close behind him.). If that had just ended sooner, it wouldn't have turned annoying. Basic bloopers (i.e; The sherrif saying 'push the button' on the mech-horse, when it was a lever.). Also, the paint messed up at times.
Overall, I liked this movie!