It's A Scooby-doo Reunion When Scooby And The Rest Of The Mystery Gang Gather At A Circus Carnival Under The Big Top. But When The Clowns Enter The Ring, Things Go From Merry To Mayhem When Clowns Turn Into Robots, Scooby Snacks Are Snatched, And Parents Are Kidnapped! It's Up To You To Help Scooby And The Rest Of The Gang Unravel The Mystery Of The Three-ring Circus In This You Choose Adventure.