Kyle Schwartz, aka Kyle's Cousin Kyle. He leaves his home in Connecticut to come live with Kyle and his family when his mom gets sick. But the boys can't stand him.
He has asthma, terrible allergies, and complains nonstop. According to the boys, "is the very worst kid athlete in the whole world." He also is Cartman's "Naughty or Nice" Christmas accountant and invested heavily in Garrison's "IT".