South Park Aargh, or SPA is a series of fanfictions/"episodes" written by Wensleydale Cheddar. The episodes are written in script style format to maintain the similarity to the original show. The stories mainly focus on humour, comedy and paroying many aspects of the South Park Fandom, most noticeably Original Characters and Mary Sues.
The completed episodes are written and published on FanFiction.Net.
SPA's timeline is based on the thought that since South Park's Season 7, the following seasons are two, and then three episodes shorter. Therefore, SPA are the episodes at the end of every season since Season 7 maintaining the continuity of the show. First episodes are the last two of Season 7 (Episodes 716 and 717), then the last three of Season 8 (815, 816 and 817) and so on.
South Park Aargh mainly keeps the same cast as the show itself, but with more appearances by background characters, particularly Jason. The only exception is an Original Character from Scotland, Fiona McTeagle and her father. She originally appeared in the series' first fanfiction, "Fiona", as a parody of a typical OC story and was the Only Sane Woman when she first appeared in the town, but then underwent a Flanderization and was settled among the secondary characters in the series. The series also possesses a number of suspiciously similar background characters called the Mary Sue clique.
While another new, foreign girl... (yawn...) joins the fourth grade class in the South Park Elementary, students' belongings mysteriously disappear. Kyle blames Cartman who is busy rallying a campaign against Mary Sues...
Dogpoo is frustrated that Mr. Garrison's class is known to be more exciting than his. He comes up with an idea Bluecap does not like. Meanwhile, Mr. Mackey gives both classes an unusual group homework. A background-character story.
Cartman has a new idea for instant cash, Fiona is up to her old tricks again, Kyle has to deal with them both while Stan becomes an activist again. Meanwhile, some of the other kids are having adventures of their own... Oh, and Kenny dies. Chaos ensues.
When Randy and his old rival join the boys' snowball fight, it becomes more and more serious. Meanwhile, Cartman tries to get proof of a certain kind of crime in Fiona's home and Mr. Garrison struggles with the fact that his assistant may be a better teacher than he is.
Token wonders how things would change if he had a family like Kenny, so they decide to switch roles. Kyle worries that he has become racist. Meanwhile, Fiona encounters a new problem in the school cafeteria and Wendy tries to teach everyone some facts about sea mammals.
While Cartman starts becoming obsessed with revenge on the new girl in school, everyone in Mr. Garrison's class is fed up with Cartman's sociopathic behaviour and they devise an ultimate plan to stop him.
When the kids finally enter 5th grade, they believe that finally their wildest dreams will come true. Butters wants friends, Fiona to earn money, Wendy a friendly principal, Kenny to get laid, Cartman for everyone to respect his authority and Kyle to finally have a normal school curriculum. However, Stan is skeptical of his friends' expectations.