Catwoman is a minor villainess in Teen Titans Go!. She first appears in "The Inner Beauty Of A Cactus", before appearing as a major antagonist in "Mo Money, Mo Problems". Catwoman doesn’t talk throughout her entire appearance.
In "The Inner Beauty of a Cactus", she, along with Penguin and Killer Croc, jump up from behind the Titans (exception of Starfire, who tries to warn them). This is the end of the episode.
In "Mo Money, Mo problems" she, along with Poison Ivy, Penguin, Joker and the Riddler, invade Wayne Manor. She is attacked by Raven but she whips her and defeats her. However, she is defeated by Alfred, who throws a teacup at her forehead and knocks her into a pile of the other villains. She is presumably arrested later.