Monsters, Inc. Mike & Sulley to the Rescue! Attraction in Hollywood Pictures Backlot at Disney California Adventure, opened to guests in December 2005, with a grand opening on January 23, 2006. Guests boarding a Monstropolis taxicab discover that something is wreaking havoc on the city—a little girl named Boo has escaped into Monstropolis and, without knowing it, is terrorizing the monsters. Friendly monsters Mike and Sulley are determined to get Boo home before any harm comes to her. The attraction took the place of the short-lived Superstar Limo.