All-American Girl: An original character who happens to share the author's religion — and has a traumatic past, and is related to royalty — spends her time insulting half of the original show's main characters.
Arddun Lleuad: A human OC from the real world ends up in the setting's land, where he is loved and accepted. A canon princess character falls in Love at First Sight with him.
Chwe Goleadau: Aforementioned human OC also becomes a very powerful hero that pretty much single-handedly saves the setting from destruction.
Code: Total Drama Reality: A dysfunctional group of veteran reality show contestants end up being bodyguards to a lonely girl and her computer. They help her to save her friends from her psychotic "brother."
Cultstuck: A young boy tries to stop a cult of terrorists from thinking of him as a Messianic Archetype. He fails, mostly because he needs said cult to shelter him from the dystopic, tyrannical government that also considers him a Messianic Archetype.
> Karkat: half-heartedly attend your own wriggling day celebrations: A Jerkass who swears a lot celebrates his birthday with a bunch of people who worship his every movement. He spends the entire fic complaining about this.
Cupcakes: A cheerful baker has her friend help her get the needed ingredients for making baked goods.
Alternatively: A girl's life is ruined when her best friend bakes her delicious pastries.
The Dangerverse: Four adults conspire to train a generation to survive a war, with special emphasis on eight children.
Living With Danger: A young boy's babysitter teams up with a strange man to kidnap the young boy, break into a high-security prison, release a man known to have murdered at least thirteen people and betrayed his best friends, then force the young boy into hiding for years, kidnapping another child along the way when said child's father attempts to rescue the young boy. The adults are eventually caught and put on trial, but get off scot-free.
Living Without Danger: Four children brought up in an unusual household, only recently forced out of hiding, go to a school and are nearly killed repeatedly. After multiple murder attempts on the part of a teacher, said teacher is killed and a rock is destroyed, leading to the deaths of two elderly people. The next year, a boy, feeling different from his family, attempts to write in the diary he took from a younger child. He nearly kills multiple people doing so, and is almost killed himself before being stopped.
Dealing With Danger: A man with a dangerous condition takes a job teaching at a large school. Meanwhile, a teenage boy's estranged father attempts to reconnect with his son, but is captured and sent to jail for doing so. Then, the teacher's condition is revealed and he is forced to resign. The teenage boy is ripped away from his family and sent to stay with a foster family he detests, despite their efforts to be kind to him. Another teenager is forced to compete with three other students, all of whom are several years older than him. He is kidnapped, but manages to escape, though another boy is killed in the process.
Facing Danger: A student is expelled for disobeying a teacher, but continues to live at the school, attend class, and fraternize with other students, despite the teacher's best efforts to find him. Then he is kidnapped, and meets his birth parents for the first time, but chooses to leave them behind and go back to school, even with a psychotic madman trying to kill him. Many people are killed, and some captured, but a breakout attempt is soon made. Unfortunately, the time in captivity had an effect on one woman's mind, and she is no longer sure of her place in the world. Also, lots of teens try to figure out how they feel about other teens, and some of them kiss.
Diamond In The Rough: Blonde woman offers adventure of a lifetime for a boy who didn't feed his cat. What could possibly go wrong?
Ditzy Doo's Dismally Derpy Day : A mail carrier has a bad day involving a new mailbox design, a pair of jerks, and an injury. But it's all right, because she learns that the guy she loves loves her back.
Digimon Fusion Kai: A group of children and their monsters fight a naked alien who is even more powerful than what they have fought in the past. One of them became a Super Saiyan after seeing someone he cares a lot dead. The rest eventually follow.
The Dresden Fillies: The quest of six friends to deal with an ancient evil is complicated by the appearance of a terrifying, but ultimately benevolent, supernatural being. In the sequel, the scheme to honor said being without terrifying the nation causes panic in a long-defunct government agency.
Group Of Weirdos: A mentally challenged skirt-wearing boy saves the world by teaming up with the thoroughly antisocial giant monsters he defeats along the way. The most popular character is a giant anemone who likes to shout its name a lot.
Guide Me Home: An emotionally scarred divorcee and a hot widower have adventures and bond while trying to thwart the machinations of the female protagonist's ex.
Guidestuck: A bunch of O Cs who were either pets or inanimate objects in canon try to survive a Deadly Game and learn from OC aliens just what the hell is going on.
Alternatively: A shameless Author Tract in the form of a Fan Fic that makes significant-to-radical changes to the personalities of the original characters. How radical? To the point where the murderous Big Bad of the original becomes a hardworking schoolteacher who makes a point of rewarding a student for doing the right thing.
Or: A snarky, romantically oblivious guy goes around saving the world, time travelling, and beating up lots of yakuza thugs. Also, he gets a harem at the insistence of his Tsundere girlfriend, who may or may not be God. While all this is going on, aliens ponder emotions and the nature of their existence, a time traveller decides to screw the rules (even though doing so might break the past), a crime heiress has a marriage arranged for her, and this OC girl wanders the universe, building up her confidence levels and sketching Hentai manga.
A bunch of cosplaying fanboys try to take over the world with a reincarnated evil in the form of a child. The child has second thoughts.
Past Sins MST: A group makes fun of the unrevised version of the above story.
Reality Checks Nyxverse: The fan-made continuing adventures of the reincarnated evil, most of which are caused by the consequences of her actions in the original story.
Perfection Is Overrated: Some teenagers fight off an invasion of Mary Sues while learning to overcome, or failing that, live with, their flaws.
Point Of Succession: A mentally unstable criminal profiler quits his job at the FBI to assist another mentally unbalanced weirdo, an old man, and two impressionable teenagers they've recruited in retrieving two students who are truant from the weirdo's school for very good reasons.
Pretty Cure Agents Of Romero: History repeats itself, but this time our stalwart band of survivors consist of a mildly autistic boy, his girlfriend, a Bifauxnen, a lady samurai, a snobby rich girl, her hapless overweight boyfriend, a ballet student, the school nurse, and a Tagalong Kid who becomes a protege of the ballet student. All except for the school nurse become Cures as they investigate the cause of the ongoing Zombie Apocalypse.
Pretty Cure Android Wars: Two trios of Cures reenact the Great Mobile Patent Wars in a corporate allegory of epic proportions detailing how using patents as an anti-competitive weapon can harm most everyone that's a consumer.
Club Pretty Cure: A film buff, a gymnast descended from a Russian ballerina, a young fashionista, a vocalist/guitarist who studies Shorinji Kempo, an otaku, a gardener, and a detective interested in the supernatural fight an evil organization hellbent on causing a pseudo-Zombie Apocalypse.
Dark Legends Of Pretty Cure: Seven Cures find their sanity challenged by a series of events that would leave even Kyubey wondering what the hell just happened in this prequel to all Pretty Cure seasons, both canon and fanmade.
Delicatessen Pretty Cure: Eight Cures at a science and technology school with gender-inverted uniforms fight dinosaurs from a different dimension; among the Cures are four ballet dancers, a singer/guitarist for a metal band, a keyboardist for the same metal band, a rhythmic gymnast, and a zombie fanboy.
Technicolor Pretty Cure: Two boys placed in an all-girls school by a lottery join forces with five of their classmates and a public school student to fight an evil organization that wants to turn the Earth into a monochrome realm.
Progress: A shut-in immortal whose best friend is an abacus tries to catch up on modern society.
Queen Of All Oni: A girl's family tries to stop her from accepting her new life style. She reacts violently.
Relationships Series: A librarian, a cop, and a military combat instructor get into a three-way relationship after a drunken night together.
Renegade: A scarred soldier hunts down a treacherous agent amid a backdrop of multiple rival galactic powers while horrors from beyond the edge of the galaxy plot galactic extinction. A bald jackass with an insufferable grin plucks everyone's strings.
SOS Pretty Cure: Pretty Cure just got a little stranger. Five of them, in fact. Except one of them is as normal as it gets. As for the other four, one of them is an alien, one of them is a time traveler, one of them is an Esper, and one of them is believed by a bunch of Espers to be God.
Stray: a young Soviet soldier gives a new meaning to Stalking Is Love as he irreparably violates his universe's space-time continuum to get together with an anime geek who lives several decades in his future. Metaphor-laden gay sex ensues.
Strays: What would the Batfamily be like if Bruce raised them right? Has nothing to do with the above.
3 Slytherin Marauders Harry Potter, Dudley and Petunia Dursely, Severeus Snape, Rosemerta the barmaid, Lucius and Draco Malfoy, Nymphadora Tonks, Tom Riddle, some OCs, and some dragons are a loving family.
Time Lords and Terror: A crazy British guy who lives in a box is turned into a horse, and helps save an alternate dimension from Darker and Edgier versions of characters from an animated movie for little girls.
Mines of Dragon Mountain: The crazy British guy and his friends go on vacation and get involved in a land dispute between dogs and trolls being manipulated by one of the truly terrifying villains of an 80s cartoon for little girls.
An Unexpected Child: A woman who runs a prison ends up pregnant with the child of her psychopathic manchildSpear Counterpart and must decide what to do with it. Oh, and it involves a maze that literally takes place in the center of the Earth and a circus that gets its entertainment from killing people.
Uninvited Guests: An albino midget opens his home to several hundred unruly psychopaths when an obnoxiously cheerful girl burns theirs to the ground.
A Voice Among The Strangers: a human in Equestria story where the woman's first interactions with the sentient horses is them putting her in a cage. She has mental issues due to this, but still saves a foal from a monster. Also, they can't understand each other at first.