Ace Ventura is a fictional character, created by screenwriter Jack Bernstein. Ace was played by Jim Carrey in the films and was voiced by Michael Daingerfield in the animated television series. Ace was the son of Rex Ventura.
He spent his adult life working as an investigator on cases involving animals, cases that took him all over the United States, as well as the world. It is not known if the Ace Ventura animated television series was canon with the films, but if it was it likely takes place before them due to the fact that the only one of his pets from the movies to appear in the series is his capuchin monkey, Spike (this suggests that he may not have gotten the rest of his pets until some point between the movies and series). During the second film, Ace becomes a Buddhist monk after a failed rescue attempt of a raccoon.
At some point he had a son, named Ace Jr., with Melissa, Courtney Cox's character from the first film in the series, who eventually became a zookeeper so that her son could see animals anytime he wanted to. Ace went missing while leading a flock of geese on their natural migration route, accidentally flying the plane he was using to lead the geese into the Bermuda Triangle while his son was still an infant. Ace Jr.
would eventually continue his father's legacy. Bernstein had wanted to do a comedic version of Sherlock Holmes, and when watching the Stupid Pet Tricks segment on Late Night With David Letterman, got the idea for a pet detective.