Ren, an emotionally unstable chihuahua, is one of the title characters of The Ren & Stimpy Show, an American animated television series created by John Kricfalusi for Nickelodeon. The series follows the adventures of Ren and his pal Stimpy, a good-natured, dimwitted cat. Ren & Stimpy premiered in 1991 as one of the “original three” Nicktoons, along with Rugrats and Doug. Throughout its run, the TV show was controversial for its off-color humor, sexual innuendo and violence. Ren & Stimpy received critical acclaim, and has developed a cult following. It is often credited, along with The Simpsons, for paving the way for satirical animated shows like Beavis and Butt-head, South Park and Family Guy, and for helping revive television animation in the 1990s.