Catman is the superhero alter-ego of Adam West. He lives at his Stately Manor in Dimmsdale, and is a good friend (as well as a legal guardian) of Timmy Turner. He is a parody of the 1960s Batman who was portrayed in live action by the great Adam West and of course directly based after Catman, another hero made by DC comics but had become less prominent superhero and hardly known nowadays to the people of Dimmsdale.
Catman is an infamous super hero in Dimmsdale, although he is actually Adam West in a cat suit. As a superhero, he is very incompetent and often causes more harm than good, resulting in lawsuits that require the help of Timmy Turner and his Fairy Godparents, with Timmy acting as his lawyer.
He wears an orange cape and mask with cat ears, nose, and whiskers, on top of a yellow suit. His suit also has an orange tail, and a utility belt which he uses to employ a number of cat-related gadgets against his foes.
Catman doesn't really have any amazing powers, but like the Crimson Chin, he does have unusual ones. He has a utility belt similair to that of Batman's, one of which contains cat litter. He is also known to occasionally spit hairballs on to people. He once had a catsuit for additional powers. Since he is actually human, he doesn't really have interesting powers at all.
Catman has a somewhat goofy personality, in which he is incredibly forgetful, in which he forgets that Timmy is Cleft. Most of the time however he seems to believe that he really is a cat in all their mannerisms, including a fear of dogs, water and a love of yarn. This also extends to eating birds and fish (raw and alive, in some cases).
Adam West, who appears as himself in several other episodes, takes on the identity of Catman, a classic television hero within the Fairly OddParents universe. He wears his Catman suit constantly, which has a tendency to creep out bystanders around him.
Catman first appeared in "Miss Dimmsdale", where Timmy met him at his statley manor. While trying to get an autograph from Catman, Timmy saw Vicky kissing up to Catman in an attempt to cheat her way to victory in the Miss Dimmsdale Contest which Catman was one of the judges for. At the same time, two people wanted Catman to go "nigh-nigh" since he was crazy. Catman refuses by claiming that he goes "nigh-nigh" when he pleases. Catman later witnessed Vicky trying to harm Timmy, who had wished himself to a judge as well to sabotage Vicky's effort, and joined forces with Timmy to stop her. However, both Catman and Timmy were eventually tied up by Vicky and left hanging over a boiling pot of Dimmadome Dimmadogs. Timmy however used his buck teeth to break a canister of cat litter on Catman's utility belt, which filled the boiling pot with cat litter just before they fell in. However, Catman and Timmy were too late as Vicky had already won the contest by injuring all the other contestants, that is until Mr. Turner showed up to compete. Mr. Turner then did all the competitions all at once which was enough to impress the judges so much that they voted Mr. Turner to be the winner. Catman was so impressed by Mr. Turner's performance that he wanted "her" number. The next day, Mr. Turner would rule Dimmsdale for a day as mayor, Catman goes to Timmy who tells Catman that Mr. Turner is not going to call him (really).
According to "Go Young, West Man!", Catman was also a child actor called "Catkid" who starred in a number of programs parodying Leave it to Beaver and Doogie Howser. Timmy wished Catman into a kid in this episode so that he could live the joys of youth that he never had as a child actor. While Timmy was skipping school to do this, Principal Waxelplax sent Truancy Officer Shallowgrave after them, but the threat of detention and the sentence to the pound was avoided when Catman was returned to his normal age and clarified that Timmy had been with him, revealing that the Turners had given Catman guardianship authority over Timmy as he served as legal guardian and pet simultaneously. Shallowgrave swore revenge against Timmy and Catman before taking off on a rocket.
In "9 Lives!", Timmy became Catman's lawyer, getting him out of Catman-related trouble by the simple expedient of wishing that he wasn't guilty.
In Cat-Astrophe, it is revealed that he has an arch-nemesis, Dogman. Throughout the episode, he thinks Sparky is him, until the real Dogman shows up.
In Gone Flushin', Catman gets accidently flushed down the toilet, when the nurse thinks he is dead. This causes him to live with the sewer rats, and become "Ratman".