Original Australian Daybill movie poster-different art. Ace Ventura Pet Detective.To be a Pet Detective, you have to understand both the criminals and animals. Ace Ventura goes even further... He behaves like a criminal animal. When a football team's mascot (a dolphin) is stolen just before the Superbowl, Ace Ventura is put on the case. Now, who would want to steal a dolphin, and why?