A double bill of comedy genius Jim Carrey's most iconic roles: Ace Ventura. in Ace Ventura: Pet Detective he must track down a kidnapped dolphin mascot with the help of the team's board member Melissa (Courteney Cox). In Ace Ventura: When Nature Calls Ace is summoned by the British Consul General (Simon Callow) to recover a missing sacred bat in order to stop a war between two tribes.