The relationship appeared at least twice before Heidi Turner's later development as a character, but was never a central pairing, and was considered a Crack Pairing at the time.
When Heidi became a key character over the course of the show's twentieth season, and began a relationship with Eric Cartman some fans speculated on social media that perhaps she would be more fitting in a relationship with Kyle, as both were intelligent and kind characters who seemed weighed down by Cartman.
In "Doubling Down", Heidi breaks up with Eric Cartman to be with Kyle, who convinced himself that he liked her. However, after the girls ridiculed her for being with Cartman in the first place, she reconciles with Cartman and is manipulated by him into basically calling Kyle a "dirty Jew", and continued to make fun of him for the rest of the season until "Splatty Tomato", when she was noticeably hurt when he suggested he wouldn't be attracted to her.
Her normal self appears in the twenty-second season episode "The Problem With a Poo" sitting behind Kyle in the music room, being closer to Kyle than she is with Cartman with Kyle showing no hostility towards her, suggesting that she made amends for mocking Kyle during her "Cartman" phase and the two are now on amicable terms.
This pairing initially received a lot of support due to the toxicity of Heiman, with some fans going so far as to say that Kyle and Heidi deserved each other. However, because of Heidi's mistreatment of Kyle in "Moss Piglets" and "Super Hard PCness", some fans have recanted their statements on this pairing, though since Heidi has returned to her normal self in the twenty-sencond season, it still has its supporters, with some theorizing that they have begun dating after Heidi broke up with Cartman.
|Bed | Betters | Bimmy | Brasther | Brendy | Bribe | Bunelly | Buttus | Candy | Carietta | Cartbe | Cartenny | Catty | Chartters | Cled | Clilly | Clisa | Clybe | Corlisa | Craigbe | Cred | Creidi | Crendy | Crizzy | Damietta | Grendy | Grether | Heiman | Heitters | Henirkle | Henriel | Hensy | Ivenson | Kake | Kannie | Katince | Kelley | Kenally | Kenbe | Kendy | Kenrietta | Kevlly | Killie | Kizzy | Kola | Kybe | Kybecca | Kydi | Kyenny | Kyndy | Lemmy | Lianed | Liartman | Litters | Loken | Lolutters | Macksondik | Mactoria | MarLuke | McDanbrady | Mibebe | Micedes | Mutters | Nichoman | Nichyle | Petephie | Philerine | Pindy | Pipbe | Pipella | Ramien | Ran | Randelly | Reboken | Redman | Renny | Revin | Rimmy | Rip | Roken | Ryle | Scilly | Scottphie | Sheopold | Sheric | Sherry | Shyle | Sip | Slavendy | Stabe | Stanrietta | Starol | Steidi | Stendy | Stole | Tannie | Tenny | Terrizzy | Tike | Tokendy | Tokole | Twebe | Twebecca | Twendy | Wetters|
|Big Gay Slave | Bratters | Buttus | Candy | Catty | Chartters | Chratan | Clisa | Clybe | Creek | Garrislave | Grendy | Heiman | Ivenson | Jallison | Katince | Kelley | Kevatan | Killie | Kybe | Kybecca | Kydi | Lemmy | Litters | Macksondik | MarLuke | Nichyle | Petephie | Philerine | Pipella | Revin | Satam | Scottphie | Sherry | Starol | Stendy | Tenny | Tokendy | Tokole|