Nitrous Oxide is a surly extraterrestrial from the planet Gasmoxia and the self-proclaimed fastest racer in the galaxy. He travels the cosmos searching for the fastest drivers of other worlds and challenges them to a race as a test of his skill. He leaves the planet alone in a frustrated huff if the opposing racer wins, but if Oxide wins, that world is transformed into a concrete parking lot while the civilization is enslaved.
In Crash Team Racing, Oxide is voiced by David Anthony Pizzuto (who also voices Komodo Joe in the same game) in the English version.
In Crash Nitro Kart, he is voiced by Quinton Flynn (who also voices Doctor N. Gin in the same game) in the English version.