Ace Ventura is a fictional character, played by Jim Carrey in the films Ace Ventura: Pet Detective and Ace Ventura: When Nature Calls. The character was also voiced by Michael Daingerfield Hall in the animated television series Ace Ventura: Pet Detective.
Ace Ventura is an eccentric and histrionic detective who specializes in cases involving pet animals. Ace possesses extreme vanity, extraordinary powers of observation, and equally great powers of deduction. He has a tendency to use foul language and to make vulgar jokes, as in the scene where he manually moves the halves of his rump to simulate a speaking mouth. He often draws complex, correct conclusions, but does not reveal them until a critical moment. He is sexually promiscuous, talkative, dedicated, and clever.
Many of the character's mannerisms (like his laugh) are drawn from another character Jim Carrey played when he was on In Living Color, Fire Marshal Bill.