An OC who is a relative of one of the existing characters could also make for great fanfiction. For instance, a long - lost cousin of Kyle. This OC could bring in new family dynamics and influence Kyle's behavior. They might have different beliefs or values compared to Kyle and his family, which could lead to interesting storylines and conflicts within the family and among the group of friends.
Another interesting South Park OC fanfic idea is an OC who is a superhero in South Park. They could have powers like flying or super strength. But of course, in true South Park style, their attempts to be a hero would be filled with satirical and comical situations. Maybe they accidentally cause more trouble while trying to save the day, like knocking down buildings in the process of fighting villains.
One idea could be an OC who has the power to manipulate time and uses it to prevent a major disaster in South Park. Another could be an OC with a unique superpower that makes them an outcast among the kids at first, but then they prove their worth in a big battle. Or an OC who is a new student from a different country and has to deal with the crazy antics of South Park while also bringing in their own cultural elements.
One idea could be a South Park and Adventure Time crossover. Picture Cartman trying to steal Finn's sword or Randy Marsh getting into a crazy adventure with Jake. Another could be a crossover with Rick and Morty. Maybe Mr. Garrison teams up with Rick Sanchez in some wacky interdimensional scheme. And a South Park and My Little Pony crossover would be hilarious too, with the boys having to deal with the colorful world of Equestria.
One idea could be them going on an adventure in South Park together, like exploring the mysterious cave that no one else dares to enter. Another could be a story where they have to work together to save the town from some kind of strange new threat. Maybe a super - powered villain shows up and New Kid and Kenny combine their unique skills to defeat it.
One idea could be creating an OC who is a new kid in South Park and gets involved in the Stick of Truth adventure by accident. Maybe they have a unique power or skill that helps the main characters. For example, an OC who can communicate with animals and uses this ability to gather information during their quests.
One idea could be Kenny getting involved in an other - worldly adventure that somehow links the South Park universe to a new and strange realm. Maybe he discovers a portal and has to deal with creatures from both sides.
For a South Park crossover fanfic, you could consider a crossover with 'Family Guy'. The Griffin family and the South Park characters could interact in some really hilarious ways. For instance, Stewie might try to out - smart Butters, or Peter could get into a drinking competition with Kenny's dad. Also, a crossover with 'Futurama' could be cool. Fry, Bender, and the rest of the Planet Express crew could land in South Park and face the unique challenges that the town presents, like dealing with the Underpants Gnomes or the giant guinea pigs.
One idea could be creating an OC (original character) who is a brilliant paleontologist but has a secret fear of dinosaurs. They get stranded in the park during a malfunction and have to face their fears. Another idea is an OC who is a tech - savvy hacker trying to expose the park's unethical practices from the inside. Or perhaps an OC who is a young orphan that forms an unlikely bond with a Velociraptor.
An interesting South Park male oc for fanfiction can be created by thinking about his role in the South Park world. Is he a hero, a villain, or something in between? For example, he could be a vigilante who tries to keep the peace in South Park in his own strange way. His physical abilities can also be a factor. Maybe he's super strong because he ate too many of Chef's special brownies. His motivation is crucial too. Is he after fame, fortune, or just wants to be accepted? By carefully considering these aspects, you can create a memorable South Park male oc for your fanfiction.
One idea could be exploring the backstories of the side characters more in - depth. For example, what made Ned Flanders become the way he is in the game's universe. Another could be a time - travel fanfic where the kids go back to a different era in South Park's history and have to deal with the problems there. Maybe they go back to when the town was first founded and encounter the original settlers.