Squeak Girl writes some of the most poignant fanfiction I have seen in the South Park fandom. She has every character's personality down perfect, and knows how to create believable drama without feeling trite. She likes to write slice of life stories about the boys' lives as they go through childhood, adolescence and adulthood. Stan/Kyle is the main pairing she focuses on, although there are a few gen fics every now and then. They're all worth checking out, even the bizarre Revolutionary Girl Utena parody. Especially that one.
Stories focused on the family and the friendly relationships of the cast. Plot-focused stories or light day-in-the-life stories. Pretty much anything that isn't focused on romance.The Mysterion Mythos: Cthulhu Fhtagn by Jizena
Synopsis: Kenny's journey to discover who he is leads him deeper into the Cult of Cthulhu. Stan and Kyle are desperate to help; and Butters and the rest of the town heroes verge on chaos and insanity...
Comments: It's really long (and still a work in progress), but definitely worth the read.
Seconded. The authors take their time expanding in the psychology of the characters, making them all believable. There are some pairings out there that vary in importance, but the main focus is still on Kenny and Cthulhu. If you enjoyed the Superhero arc, you will love this story.
Synopsis: Guess. Kenny McCormick's Journal. Didn't see that coming, huh?
Comments: Another amazing story written by the awesomely talented Seaouryou. Read it, and then weep because you know you'll ever be able to write something as good as that. It will make you double over in laughter for an hour and then wipe your tears for another. Read with caution.
Seconded. You will laugh, cry and just generally melt with happiness
Synopsis: Kenny is struck by lightning while standing too close to Stan. They both should have died, but because of Kenny's... gift... they switched bodies instead. Naturally, they decide that the very best and most logical way to switch themselves back is to go pay a visit to the Dark God Cthulhu.
Comments: What seemingly starts out like just another clichéd "Freaky Friday" Flip fic soon delves much deeper into Kenny's immortality and identity as an Old One. And friendship.
Synopsis: It sucks being on Santa's naughty list. An outraged Cartman takes jolly old St Nicholas hostage and with the help of Kyle Broflovski, the boys declare war on Christmas and everything it stands for.
Comments: Seriously, read that synopsis and try to tell me that this concept doesn't just reek of awesomeness. And truly, it is awesome! It delves into why Cartman hates Kyle so damn much, keeps their Foe Yay (hell, it even takes it Up to Eleven on Cartman's part), and gives us an adventure that could easily be an actual episode in it's own right. There's, however, only three chapters of what should be a full story, and it will likely never be finished. Nevertheless, these three chapters are sure to please.
Sypnosis: Kyle has been pushed over the edge from being bullied in middle school, is still suffering from it, and has been driven to suicide. Very dark fanfic, and deep too.
Comments: Such a deep and sad story. Anyone who has been endlessly bullied in the past can easily relate to it. Wanting to get revenge on the people who bullied them, having suicidal thoughts, etc. A must-read.
Synopsis: Takes place during the boys' junior year of high school. Stan and Kyle's Ho Yay leads to rumors about the true nature of their relationship, which in turn leads them to see if such a relationship would work. Meanwhile Butters tries to help Kenny deal with his issues and Cartman and Wendy fall hard into Foe Yay.
Comments: All of the characters behave exactly as one would expect them to when aged up to their late teens. The main story is cute and well written, but in a clichéd slash fic way. The two side stories are the real gold, both of them working gradually to their inevitable conclusion and in a fashion that leaves you wanting to see what comes next. So basically, it's a romantic South Park fic that actually works.
skrt: Brilliant not in that it invents new tropes for the South Park high school slash fanon, but plays all of the typical plot details and characterizations very well, almost as if amassing them into one super-fic. Does not attempt to subvert any clichés.
The single best South Park fanfic this troper has ever read. It adds all the weird things that happen in South Park, without sounding like the author is trying to hard. The characters mature perfectly and maybe Kenny/Butters doesn't sound like much, but it ends up being perfect. I have never seen a characterization of Kenny that I have liked so much, in the end, him being with Butters only makes sense. Very enjoyable, even if slash squicks you.
Synopsis:Craig Tucker is sick. Craig Tucker is stalking Tweek. And Craig Tucker knows that he wants Tweek all to himself more than anything else in the entire world. Craig/Tweek WARNING: DO NOT READ IF EASILY UPSET.
Comments:The best thing about this story is that it pulls you in and refuses to let go. This is the best Creek story ever because it is so deep and intricate. The boys are completely in character and the events in the story will keep you on the edge of your seat. This story should be read by anyone who loves the pairing of Craig/Tweek and anyone who loves Romance/Horror stories. The writer does a perfect job of balancing out the romance and the horror to weave a complex story that is absolutley perfect and well-written. The link is to the edited version on fanfiction.net, and anyone who wants to read the darker and scarier unedited version should go here: 
Synopsis:Craig was addicted to a lot of things. Overuse of non-verbal swearing, cigarettes and even lying. But he really only needed one thing, even if he didn't realize it. He didn't need anything else but him.
Comments:The mystique to this story, it's so intricate, if it was a candy, it would be made with the sweetest, most carefully purified sugar, and it would be delicate enough to snap into a million pieces, just like that. It's on the edge, but nowhere close to falling off. It makes sense, enormous amounts, no confusion about what it was you just read, it's in a language clear as day, but as refreshing as water to a parched mouth.
Synopsis: Terrance and Phillip get married, but their relationship is threatened when Saddam Hussein and Scott (the dick) join forces to try to break them up.
Comments: ALL CHARACTERS AND EVENTS IN THIS FANFICTION—EVEN THOSE BASED ON REAL PEOPLE—ARE ENTIRELY FICTIONAL. ALL CELEBRITY VOICES ARE IMPERSONATED.....POORLY. THE FOLLOWING FANFIC CONTAINS COARSE LANGUAGE AND DUE TO ITS CONTENT IT SHOULD NOT BE READ BY ANYONE
Pairings: Stan/Kyle, others should be left as surprises
Synopsis: Years after losing contact with their childhood friends, Detectives Marsh and Mc Cormick pick up a domestic abuse case that exposes their own dark history.
Comments: Foodstamp specializes in writing mysteries — a rarity in a fandom that is afraid of anything outside of the standard high school coming-out story. Yet she manages to do this with a remarkable amount of feeling and a writing style that will encourage repeated readings for the sheer pleasure of her prose. The disturbing initial crime gives way to layers of complexity that are fitted together seamlessly. Immense care has been taken with the details; the characters are complex to the point that the villains are sympathetic and the victims aren't innocent. The reader finds himself just as lost in the treachery of the plot as the characters; the romance adds a necessary weight to the story, rather than being gratuitous slash. The authoress' use of Kenny as narrator subverts almost every trope his character is subjected to in the TV show, and in the fandom.
Synopsis: Wendy's wanted to be the head of the school newspaper for years. She just never thought she'd have to deal with anonymous love letters, an increasingly distant boyfriend, and Cartman.
Comments: Another story written by the incredibly talented Seaouryou. This fanfic is the gold standard for Cartman/Wendy, and the Stan/Kyle subplot is adorable, though much less fresh. Perhaps the nicest thing about this particular story is that it's not simply a bland platform to project a pairing on; the plot is intricate and features twists that you will never see coming. Add all that to witty, fast-paced writing, and you have yourself one of the best South Park fanfics on the internet.
Sypnosis: The last few days were treacherously warm. WWII AU Kyman
Comments: I think we all know how overused the World War II fanfic plot is when it comes to Kyman. It's only natural, since it is the romantic pair between a Jew and a Nazi-wannabe. So it's no surprise that there are tons and tons of WWII/Holocaust AU fanfics when it comes to this pairing. But, even then, this is a story that takes this painfully overdone plotline and changes it into something else entirely. The plot is focused on Kyle, speaking in first person, as a Jew caught and placed in a Polish ghetto, and his following Eric Cartman's plans to get the both of them to freedom. It's a oneshot, so it's hard to fully summarize without spoilers, but it's pretty long at about 24k words. However, with an eye for historical detail, poetic writing and some great dialogue, this is definitely worth the read for any Kyman shipper.
Seconded by Uki. This is one of those rare stories on fanfiction.net that doesn't lose sight of who the characters are while giving them such a heart-wrenching, realistic portrayal that you can only sit in stunned silence after finishing it so you can at least TRY to take it all in. 24k words or not, it is more than worth the read.
Synopsis: A deal struck over secrets and hidden lust. You're just begging the pressure to drown you.
Comments: One of the darkest (if not, the darkest) Creek story ever written, with violence, sex, rape, insanity to a T, death, murder. An amazing piece. The plot, the characters, the way Craig's dark side is described and how Tweek descends into insanity more and more... it's brilliant and quite accurate, with unique, horriying, complex and interesting writing.
Warning: Not recommended for those under 16 years old, unless you are a Nightmare Fetishist and can handle it. That is available for any other age, as well.
Synopsis: Tweek has never been so sure of something in his life. Craig wants to eat him.
Comments: A one chapter story, cute and hilarious, that presents the world (particularly Craig) through Tweek's eyes. Really good writing, the characters are well portrayed and the events are original and unpredictable.
Synopsis: Cartman and Kyle are trapped in an ice cream parlour in the early hours of the morning. To pass the time, Cartman decides to read a list of reasons he hates Kyle. Then the police show up. Some slash.
Comments: Amazing and funny short piece that is so canonically portrayed that it can almost be part of a real South Park episode. Excellent writing.
Experiment_282: This troper was cracking up towards the end, and agrees that it is like coming out of an episode.
Synopsis: A rough couple of weeks in the competitive South Park antiques market.
Comments: Absolutely hilarious. Not only does it subvert the normal South Park fanfiction clichés, like aging the characters to their early forties rather than making them high-schoolers, but is just spectacularly fun to read. Stan and Kyle, together for over 25 years within the story, are less sickeningly sweet and more like a jaded, old married odd couple, who run (but don’t own) their own little antique shop. The dialogue is witty and charming, the story is original and amusing much of the time, and all the characters are completely in character. If you have the time, check this story out, if not just for the wonderful portrayal of Stan and Kyle and their lives post high-school fanfics.
Recommended by meltingsunshine (who wonders if the author is the one who stole this troper's preferred skype name)
Synopsis: Cartman was pretty good at ruining moments. Cartyle
Comments: This troper truly enjoyed this little oneshot, and the author in general. The prose is lovely and descriptive, the characters are portrayed fantastically, and Cartman is likable and almost genuinely sweet without being OOC. And this troper was cracking up at the ending. it's not too long, either, but entirely satisfying. A recommended read, for any fans who enjoy the sweeter side of Cartman and Kyle's relationship, but still want the bickering aspect included.
Synopsis: Darkhearted Damien has been haunting Pip's dreams for nearly nine years, and Pip is bent on ending the nightmare. However, when the two are finally reunited in an explosive encounter, Pip realizes he needs a lot more closure than previously thought.
Comments: The South Park Slash fandom tends to shy away from anything that doesn’t involve the typical high school romantic escapade, which is a great disappointment for those looking for something different in their fanfiction. Out of the known pairings in the South Park Slash fandom, Damien/Pip is perhaps the strangest, due to the fact that in the one episode Damien is in, he sets Pip on fire to impress the other kids. However, Society’s Cavity takes the already existing canon with these two characters and supplies the readers with character depth, witty dialogue, humor, sexual tension, a heartwrenching Rape as Drama and a believable relationship (well, as believable as the The Antichrist can go). Perhaps the best part of this fanfiction is how the author analyzes the whole “Anti-Christ” part of Damien, which is rarely if ever done. A wonderful read, and recommended to anyone who is tired of the cliché High School AUSouth Park fanfiction.
Synopsis: High school is over and college is a thing of the past. Rich, successful, and two time zones away from the headache that is South Park, Wendy and Eric Cartman now live in blissful matrimony.
Comments: Basically, it's a series of one-shots centered around Cartman and Wendy's married life. Do Cartman and Wendy have a believable relationship without seriously butchering their characters? Yes, and it is hilarious.
Pairings: Cartman/Kyle, other minor pairings, including Stan/Wendy
Synopsis: Change really is a funny thing. Recently, Kyle has been noticing that his feelings towards a certain fatass are changing. Sure, he's still a horrible, obnoxious racist, but Kyle's starting to enjoy the insults and embarrassment. Sure he hates himself for it, but all that changes after one stupid bet at one stupid party...
Comments: I was skeptical first finding this fic, as I wasn't a Kyman fan at all, but as a reader, you really get into how DanniDinmont portrays the characters. Kyle is the narrator, and you can really get lost in his thoughts and believe his storytelling. Yes, this story contains craptons of filthy, filthy smut, and is pretty long (over 180,000 words), but the writing is outstanding and the author really takes us deep into the boys' interesting relationship. The Foe Yay works wonderfully while still keeping the characters believable, and it's really fun seeing their relationship progress and eventual twists in the plot keep you interested. You can also see characters and the relationships between them mature over time. This is likely my favorite fanfic of all time, in any fandom, certainly worth reading if you don't mind explicit sex scenes... even if you don't like this pairing (it sure changed my opinion on them!).
One of the best Cartman/Kyle fics this troper has ever read. No joking.
Synopsis: Stan Marsh has a secret; he takes ballet. When this is discovered by Cartman, he tries to use it to his advantage. Unluckily for all involved, Stan and Kyle attempt to dig up some dirt on him- and what they find is more than a little disturbing.
Comments: This fic is hilarious. Well, hilarious aside from the Stan-torture that Cartman puts him through, and the squickiness of Cartman's "secret" obsession. This troper's favorite was just how well illustrated Cartman's obsession over Kyle is, and the Villain Song shoutout near the end. When all else fails, quote Disney Villains! If you want to read a South Park fanfiction that isn't a High School AU or a romantic Slash Fic, try this fic.
Pairing(s): Stan/Kyle (although could be interperated as non-romantic)
Synopsis: "I'm going to kill myself." Stan went to the roof of his apartment building, one determined thought in his mind, and then the redheaded stranger ruined everything. Or maybe he was Stan's savoir. "That's tragic, we've only just met."
Comments: Set to Death Cab for Cutie's "Lack of Color", this is perhaps one of the most moving and original Style pieces on fanfiction.net. This is the author's perception of what would happen if Kyle had never lived in South Park, and Stan had become a victim of "the Emptiness" which clouds his mind and sense of being and purpose. Tearjerker-ness ensues (this troper cried her guts out, especially since "Lack of Color" is one of her favorite songs). While only one chapter long, the emotion of this story comes across just beautifully, and the fact that only Stan and Kyle are really focused on, and their relationship, despite only knowing one another for a few days, gives such a lasting impression. This is so fantastically written that I could honestly gush with praise for hours on end. Mr. eames has stated that this was re-written multiple times, and that shows. Characterization is nothing short of wonderful, the writing itself is graceful and poetic, and the concept of suicide is presented, striped to its rawest of forms, and shown from both a positive and negative light as both Stan and Kyle face their problems and end up saving one another from lives cut devastatingly short. However, I would advise not reading this while "Lack of Color" plays in the background. You will cry.
Seconded by lizoftheinfinite. This is the most moving fanfic I have ever read. Words leave me after reading this.
The New Year by mr. eames (starting to see a pattern?) (Warnings: Mild slash, language, mentions of suicide, gore and character death)
Pairings: Stan/Kyle (naturally), Craig/Tweek, Christophe/Kyle, and other more vague pairings.
Synopsis: Stan knows that he's normal. In fact, he's sure that he's normal. So what if the Voice in his head is a little more demanding than should be normal? That doesn't mean he's any more crazy than anyone else, right? And that sure as hell doesn't mean that he belongs in Mountain Crest, surrounded by OCD manics, delusional psychopaths, and bipolar redheaded roomates. Maybe he shouldn't have spent New Years Eve trying to kill himself.
Comments: It's obvious from reading the rest of these recomendations that mr. eames is a favorite. This fic is absolutely no exception. The New Year is fantastic. If you're a fan of psychological drama, this is a must-read. This troper's favorite is just how much research was put into this fic, as well as how fitting the disorders match with the characters (Tweek's OCD and manic, Kenny's delusional and thinks he can't die, Kyle's scary amounts of Bipolar mixed with stubborn, etc.). The way she portrays these characters is praise-worthy, and the plot is interesting and attention grabbing. Now, I must add that only eleven chapters have been written, and the last update was in 2009. Don't expect that cliffhanger to be concluded anytime soon. Eames stated sometime late in the fic that she had grown tired of the story, and that begins to show, as the writing begins to sound tired. However, that doesn't matter. The first ten chapters are fantasic, and praise is deserved for its excellence.
This troper agrees that this fic is amazing. I read it sometime last year, and though disappointed that it was never finished, "The New Year" is a unique and well-written fic, one of my South Park favorites. Reccommended for anyone interested by the psychological-drama AU idea... Or anyone else who loves some good, unique, not-a-high-school-AU fics.
Synopsis: In a class where there aren't too many expectations, students are about to get far more than they bargained for. Bet your school never taught you this.
Comments: A deconstruction and reconstruction of what exactly "Style" is and why it's so special. Adult Kenny teaches a sixth grade sex-ed class about more than sex, but about friendship, relationships, and soulmates. Unfortunately, it seems to have been abandoned, but its inconclusive ending still closes on a happy note.
Synopsis: There are a lot of things Craig hates, but none could compare to his hatred towards Tweek. He bullies him everyday and can't wait to have him gone for good. But even the hardest of hearts have a soft side for everybody. When will Craig find his for the Spaz? He wouldn't know, and he wouldn't care.
Comments: Really interesting story that represents how downright hate can become the opositte feeling. A dark aspect on Craig and Tweek's connection. It's not cheesy and the evolution of their relationship is portrayed realistically. Recommended.
Constellations: Christophe's life story was not very long. It began in a drug store at 3 am, where he met Kyle for the second time, and it ended with his death a few months later.
Waiting Room: He was thinking of what Kyle said, "Love is watching someone die." And that's exactly what he had done. Set to Death Cab for Cutie's "What Sarah Said".
Comments: Lumping stories together that are not a part of the same story/timeline may be a peculiar thing to do, but I did it purposely here. These are the two stories written by mr. eames that are based around Christophe/Ze Mole and Kyle as a pairing (excluding the previous case of The New Year), and while they're completely separate stories, they just seem to fit together as if they should be a single entity. Both are from Christophe's point of view as he details points in his life with Kyle as a secondary yet incredibly important character and how both shape him into who he is now. Constellations is the longer of the two, which gives the reader an insight into both boys’ psyche as their relationship, subtle and genuine, evolves to an almost hazardous point. Waiting Room is all entirely Christophe-centered, Kyle only appearing in flashbacks since it does take place after his death as Christophe looks back on how they met and how they both perceive the concept of death. My praise is unnecessary, as I cannot gush enough about my love for this bizarre but fantastic pairing and how well represented they are here. Please, give mr. eames all the credit she deserves and read her wonderful stories.
Synopsis: What could possibly have Mary Sues, love triangles, crazy children, impulsive romances, and bad grammar? It can only be…The Clichéd Plots.
Comments: This troper can't stop laughing from this wonderful Parody. It makes fun of the terribly written and overdone things in SP fanfiction, (coughJockStancough). The only downer about it is, it hasn't been updated since 2006, when there's plenty of new things in SP fics to make fun of now. Rather you like slash or not, this is a must for those who want a good laugh.
Pairings: Wendy/Butters, Damien/Henrietta, Various slash pairings.
Synopsis: How the "South Park" characters' senior prom is likely to go if most fanfic writers get their way.
Comments: This is a good parody and fic with underused pairings. The only thing this troper gripes about though, is that the author should've made the girls(except Wendy and maybe Henrietta) gay too, since the SP fic writers do that too. They also make even the grownups gay(mainly Randy/Gerald). But other then that this fic is good. Like slash? This is for you. Don't like slash? This is for you. A must read.
Synopsis: Close friends Bebe, Butters and Wendy are college freshmen, with Butters in love with Bebe. But he's nervous about being intimate with her- which leaves Wendy to help ease his nerves in a series of special lessons.
Comments: Um....This is a story about Wendy helping Butters with his relationship with Bebe, sexually. The two have sex so Butters will know what to do when he has his 'time' with Bebe. So...it's-it's a M-rated detailed sex fic...but it's a good and well-written one about their friendship and Wendy helping Butters. Another nice Wendy and Butters interaction fic.
Synopsis: Kyle and Cartman are nothing to each other... not even friends. But when both have dreams that the other will die and in the process hang out with each other to protect one-another, will they start to develop feelings for each other?