The following is a compiled list, in episodic order, of instances where a character has vomited. See the next section for the times Stan has vomited for Wendy.

South Park ©︎ Trey Parker and Matt Stone

Dec 24, 2021 · Stan pukes on Wendy for the first time. From the very first episode of 'South Park'!Season 1, Episode 1 "Cartman Gets an Anal Probe"

Trying to find the cutoff time when Stan stopped puking. He seemed to do this every time Wendy talked to him. Was there an episode where he got over this reaction? Or did it just kind of go away without explanation?

Feb 12, 1998 · Wendy is jealous and she reminisces about the days when Stan would puke for her. In class, the boys all compete for the attention of Ms. Ellen. Chef comes in and hits on her, using his singing skills to ask her out. Mr. Garrison wakes up from the surgery.

Oct 22, 2021 · It's because he gets awfully queasy around her. In the Early seasons he did it. Because he likes her. He is in love with her. 17 votes, 11 comments. I have never understood it completely to be honest.

Season 11, Episode 14 "The List"

There was an episode which someone kept puking after anyone said anything to him. Like when he went to a restaurant the waiter asked him and he puked. The Stan one you said is different afaik.

Feb 11, 1998 · Wendy is jealous and she reminisces about the days when Stan would puke for her. In class, the boys all compete for the attention of Ms. Ellen. Chef comes in and hits on her, using his singing skills to ask her out. Mr. Garrison wakes up from the surgery.

Feb 12, 1998 · The boys talk to Chef about how in love with Ms. Ellen they are. Wendy is jealous and she reminisces about the days when Stan would puke for her.