Best Simon/Betty Time Travel Fanfics

by mushroomnoodlez

Betty Grof exists only as concept, a temporary construct in the consciousness of GOLB. The entity piloting the god is no longer either one of them. Sensing Simon's 12-year plight without her, a well-meaning GOLBetty pulls him out of the timestream to give him something to remember her by. She can't

by fivefish (calafax)

Newly-tenured archeology professor Simon Petrikov is finally at the point in his career where he’s able to go on expeditions alone, which is great, because he’s tired of being laughed at and having things thrown at him. But when an enthusiastic, bright-eyed graduate student named Betty approaches hi

by Major144

Simon gets the power of the crown, but he doesn't lose his sanity or Betty. The war happens and Simon and Betty find Marceline and raise her as their own. The new family face many difficult challenges. A story in which a hero will rise and help defeat a great evil in the distant future. A different

by NeoSartor_Resartus

Finn and his friends narrowly prevailed during the events of In Extremis. And yet, the Land of Ooo remains on the verge of crisis – a flashpoint of clashing convictions, covert agendas, and re-emergent threats. The wheel of fortune is poised to turn once more with all the world racked upon it. Its c

by Kaboom91

After countless runs, something goes wrong, and now humans and monsters alike have been pulled into a strange new land with its own rules and its own dangers. Come Along With Me for the crossover nobody asked for, its ADVENTURE TALE!"

by RedSilence

In a world where anything people draw/write on their own skin appears on their soulmate’s, when Marceline was 10, she got her first message from her soulmate - "I hate you". After starting off on the wrong foot and with her mother's passing, she made a pact with her soulmate to remain pen pel only.

by brennah

Six years after Bonnibel breaks up with her and removes herself from her life, she shows up at Marceline's coffee shop after starting residency at the hospital across the street.---“Marcy?” Marceline was holding two finished drinks in one hand and a quart of milk in the other. All of these items cra

by Firegloom

Only two phrases are stronger than I Love You:I’m Sorry and I Forgive YouA thousand years in the future, Shermy and Beth stumble upon a fellow rebel. She brings them to the Ice Kingdom to meet the Ice Prince, and he tells them the story of his late father and mother.What if Ice King saved Betty from

by CottageDeer

Simon had been given the Mpreg ray by his late fiancée, Betty (GolBetty). However, the creation of the spawn could spell danger to both himself and everyone around him. However, Simon doesn't know about the bun in the oven. He has other things to focus about, like his friends Fionna and Cake found a

by Petrigrofxlurker

A slight follow up to my previous story “A gift”, but new tags; thus a new story.—Simon tries to pursue an Adult Store, looking to find something new and entertaining for his and Betty’s love life.

by Petrigrofxlurker

Simon and Betty are adventuring, he falls in a creek like the clumsy mf he is. Somehow, despite trying to strip down and dry- he ends up wet again. Wink.

by Petrigrofxlurker

Betty has a little gift for an overworked Simon… it leads to a bit of extravagant fun..!

by Multifandomwriter775

Betty and Simon finally go on their first official dinner date. While Simon nervously hopes everything goes perfectly, Betty can hardly believe she's spending the evening with the man she's admired for so long. Completely smitten with him, she has no idea that Simon is just as captivated by her, or

by Petrigrofxlurker

Simon ends up in the Hospital, Betty is by his side. Shenanigans ensue. —- Enjoy~ ❤️ (if anyone is still around in the fandom to enjoy that is lol)

by bettywetty

you cant feel pain in dreams. its the best way to know youre not awake.

by mouseimp

Marceline has a new fan. Now with updated formatting & a full-color illustration :)

by gusteofwind

In this AU, the world is normal and like our real world. Simon Petrikov is a student at Wutland State College majoring in Archaeology and is so autistic and nerdy with an incredibly huge heart. He’s incredibly knowledgeable, except when it comes to deciphering exactly how those around him feel. Simo

by ladyscandal

Adventure Time mafia AU.Decided to write one on AO3 inspired by an tt account called @adventure.trapz, who sadly uses AI to make their content. Warning: this author has only watched 7 seasons once and has no idea what happens in other seasons, so this may be very inaccurate. More characters may be a

by Catz_Catttle

This is my rendition of what happened after Simon and Betty left each other at the bus stop in Fiona and Cake this does include themes of drinking eating disorders and just like being sad yk

by tollyisnothere

A quick informal blurb over betty grofs character in the show