Kyle Schwartz is Kyle Broflovski's maternal cousin from Connecticut. He has heavy breathing due to asthma as well as poor eyesight, so he has large glasses that are for prescription and likely farsightedness due to the magnification of his eyes. Kyle made his first appearance in the Season Five episode, "The Entity". As a stereotypical Jewish person, he is an asthmatic; this makes him similar to his cousin Kyle Broflovski in health because the latter has diabetes, as mentioned in "Cherokee Hair Tampons". Kyle is the only revealed asthmatic character besides Stan. He has an unnamed mother who is his Aunt Sheila's sister, and she is only ever brought up in "The Entity" and is never shown or heard. Despite Stan also having asthma, he does not bring it up or empathize with Kyle while Kyle brings up his own asthma.
Trey Parker gave him the last name Schwartz because he really liked the last name and has used it in productions on multiple occasions, such as being a screen-name credit in the unaired pilot in the beginning intro before the unaired pilot started. In fact, Nurse Gollum's prototype name or unaired pilot name is Nurse McShwartz.
Background[]
While his mother is in the hospital, Kyle stays with the Broflovski family during the events of "The Entity". He is a stereotypical American Jewish kid (with characteristics such as hypochondria, poor athleticism and being good with money), unlike Kyle, who is worried about his anti-Semitic friend Cartman, who he fears will constantly make fun of him. Kyle then offers Cartman $40 not to make fun of Kyle Schwartz. Cartman initially tries to comply with the agreement, but later makes a concentration camp joke in class, blowing the deal.
Kyle Schwartz then states that Kyle (Broflovski) should have tried to get away with paying Cartman $12.50, instead of $40. Angered by his ingratitude and personal quirks, the boys help Broflovski try to get rid of him. They put him on a sled tied to a bus headed for Connecticut, and later seal him in a box and place him on a plane to Antarctica. He nevertheless keeps returning to the Broflovski home. In the end, his mother's condition improves, and he decides to go home after receiving $5,000,000 from an investment bailout to the airlines. The boys suddenly see their opportunity and try to convince him to stay, but Kyle Schwartz replies by saying that he could not stand how everyone in South Park is a stereotypical hillbilly jock redneck.
Kyle also appears in "Red Sleigh Down", where he calculates how many presents Cartman will get for Christmas, concluding that he will still owe two presents even if he finds a cure for cancer and AIDS before Christmas, and "The Losing Edge", where the boys play on the South Park Little League Baseball Team and have to get the worst person they can find to play because they do not want to qualify for a national tournament.