1 - 20 of 58 Works in Xanthar (Gravity Falls)
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In which a GF-fangirl wakes up to find herself in the body of a baby Bill Cipher before the events of canon happens. Welp, lets see how much she can fuck this up.
(Updates once every other week)
(Now canonically a shared universe with the Triplet AU, Dimension 46'/-A and One Way(to absolve his crime))
IMPORTANT NOTE: Ok, so I've decided to just put a warning right here about BlueBill from Dimension 46'/-A. He's not a good person, and is going to trigger a lot of people. Also putting up an angst warning for when things get super emotionally draining as a result of BlueBill and other terrible things making MizBill spiral into depression.
This is backstory, character exploration, slice of life and very much a cradle to the grave sort of thing. And... apparently the romance is finally coming up. Woop?
This is not meant to be taken seriously, it's just a stupid idea I'm writing for fun.Series
- Part 1 of Illusion IS Reality
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Some Sunny Day - A Gravity Falls Season Three Fanfic by Cheshire_Cipher33
Fandoms: Gravity Falls
23 Jan 2026
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Bill Cipher is brought back to Gravity Falls through a desperate deal with the Axolotl. Stuck in a human body and with the God that is trying to redeem him, Bill is left to seek out the only people he has left - The Pines twins, who have come back to Gravity Falls once more to live out their dreams of getting into college and living with their great uncles. Will Bill manage to convince the Axolotl to let him go, or will he end up finding that being trapped in the sleepy town is not as bad as he's imagined?
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A Summer To Never Forget by Mattie123xyz
Fandoms: Kindergarten (Video Games 2017 2019), Gravity Falls
10 Jan 2026
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Billy was always seen as a nerd for believing in the supernatural. No one believed him, not even his parents and sister. He and Lily are sent to Kinder Falls for the summer to stay with their great-uncle. There, Billy meets Alex, a half-demon, who quickly becomes his friend. This is the start of an amazing friendship. They go on many adventures, and love blossoms slowly between them.
Meanwhile, Bill has plans to use Billy for his own evil purposes. Alex won't take that and will protect Billy at all costs.
Decided to turn this into an actual story.
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After running away from home due to a huge familial fight breaks out, Ford and Stan find a flyer to enter a traveling freak show/circus nearby. With the rise in Ford’s fame, the growing distress in Stan’s body, and the mysteriously charming contortionist acrobat alluring them both, it’s only a matter of time before things turn sour.
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You heard about "Time works differently in the Theraprism" now get ready for "TIME DOESN'T WORK DIFFRENTLY IN THE THERAPRISM - WHAT DO YOU MEAN IT'S BEEN 300 YEARS?! WHAT DO YOU MEAN HE'S DEAD?!"
That's right! Bill gets busted out of his Axolotl mandated therapy only to realize his arch-nemesis and favorite human is dead, gone and buried. He doesn't take kindly to that fact, and decides that chronological time is for losers who doesn't know how to make sweet deals.
Now if only he could get his stupid, spiteful, stuck-up, stubborn, snarky human to take him back! I mean really- What's his problem? Bill said he was sorry. Okay he didn't, but that's what he meant! Maybe. Sort of.
But-really-if-you-think-about-it-it's-Stanford's-own-fault-and-Bill-was-just-
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An Extra Two Years Can Make All the Difference by MandatoryWeirdness
Fandoms: Gravity Falls
16 Nov 2025
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We all know how Stanford Pines was right about to kill Bill Cipher when Stanley turned the portal on.
Well, what if he didn't get it working that year? Or the year after?
What if Ford spent another two years in the multiverse, after managing to kill Bill with his Quantum Destabilizer?
Well, you're about to find out exactly how it's different here.
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Till Weirdmageddon Do Us Part by Behavioral_Unit091_B, selfless_solipsist
Fandoms: Gravity Falls
05 Nov 2025
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UPDATE (30.09.2025): Chapters from 1-22 are gonna get updated soon due to me finally learning how to space things out correctly + to fix the formatting in the dialogues and such. NEW SCENES ARE GOING TO BE ADDED AS WELL. (5/22 complete)
In a chaotic twist of fate (or more like a weird trial from an ancient, cosmic axolotl), you find yourself married to Bill Cipher, the interdimensional demon and chaos incarnate. Two weeks into your new life together, you're just trying to survive the absurdity of being legally bound to a two-dimensional triangle with a massive ego and questionable decision-making skills. With Bill floating around making strange observations about the horrors of human biology and occasionally trying to "bond," things are... well, let's just say "normal" isn't in the cards. Will this be the most dysfunctional marriage in the multiverse? Probably. Will you survive? Maybe. Will it be hilarious? Absolutely.
Series
- Part 1 of Born of Chaos, Bound by Choice
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Two Uncles, a Girl, And a portal by Insert_Demonic_Screaming_Here, NotYourProphet
Fandoms: Gravity Falls
29 Jul 2025
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Instead of Ford coming back to gravity falls after 30 years, Mable gets sucked in instead. the two of them will have to work together to make it back to gravity falls.
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After sailing the sea with their Grunkle Stan for a couple of months, the Pines twins are now returning home. Regardless, a dilemma occurs when Captain Bill Cipher passes by their ship, becoming infatuated with his soon to be Pinetree.
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it's literally twilight except gravity falls.
i had a dream ok. i had to make it reality. sorry.
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- Part 1 of Gold Medal Ribbon Saga
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In all worlds, Bill hurts the ones he loves. It's just a matter of when.
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A retelling of how Bill came to be.
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Ford is Chief of police and Bill is a Mob Boss. They are married, and they are aware of eachother's profession. But give Bill a gun and a syndicate and you get a recipe for drama. Ford loves his husband, but his most common thought is 'really Bill, you had to do that?'
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A series of interludes from other points of view, set between the chapters of There's something queer about Grunkle Ford!.
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- Part 2 of That Queer Grunkle AU
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Luego de haber entregado torpemente la ecuacion a cambio de la proteccion de su familia; Stanford Pines es torturado dia a dia por Bill Cipher.. Sin esperar la extraña e inesperada propuesta que el triangulo le propuso.
(JAKSJ, francamente, se me ocurrio esto mientras revisaba la AU de "Mr Pines" de Tumblr, y decidi transtornarla un poquito en el periodo del Weirdmaggedon, luego de la traicion y todo eso... no se como sentirme al respecto)
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Have you ever wanted to know more about Anti-Mabel's universe? Then you've found the right fic! Join the Pines twins on an amazing, yet exaggerated, trip!
Sent to stay with their great-uncle over summer vacation, twin siblings Mason and Mabel Pines have close encounters with the strange phenomena that lurks within the small Oregon community of Gravity Falls, while staying with and working for their tourist-friendly-running shopkeeper great-uncle Stan.
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Ford is captured only a year after playing hide-and-seek with Bill in the multiverse. What will his fate be?
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Three things that Stanford Filbrick Pines never expected during and after the Portal test’s day:
1) being the witness of how his assistant and closest friend is swallowed by the same machine he worked so hard to build;
2) calling his estranged brother for help to rescue Fiddleford; and
3) having his memories erased by his own closest friend while Stanley is still on the other side of the portal.
At this point, Ford is 100% sure that the whole world hates him. But hey! At least that’s not the worst he’s going to go through, right?Series
- Part 1 of Lee, the multidimensional traveller
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In a distant universe of that has been stuck in the 1920's for a trillion years, the Cipher brothers struggle to get by. Demons casually walk among them, and they kneel at their feet...until Bill tips the scales. Find out how Bill became the Overlord of Weird, and how the Ciphers were torn between dimensions.
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GFS3: A Party that Never Ends by Dot_Matrix
Fandoms: Gravity Falls, Flatland - Edwin A. Abbott
27 Dec 2023
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Bill catches onto Stan and Ford’s ruse and gets to mold reality into whatever he wants.