The Crystal Cove Mystery Tour bus is a vehicle Angie Dinkley drives to take tourists around the sights of Crystal Cove as part of one of the attractions of the town's Spook Museum, owned by the Dinkleys.
Scooby-Doo! Mystery Incorporated
It was used for a tour to the neighborhood where the kids were 'spookified'. (The Song of Mystery)
Angie Dinkley was caught up 'in the love' along with everyone in the bus. (Where Walks Aphrodite)