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Dawn of the Catalyst by SquilliumFancyson reviews
The Gum War had come to an end and Ooo was once again at peace. As people rebuild and friends return to their lives, time had flown by as Finn kept himself busy with adventuring. Ooo's beloved hero continues to try and live his life as a "normal" human, but unfortunately for Finn, being the incarnation of a cosmic entity complicates things.
Rated: T - English - Adventure/Fantasy - Chapters: 5 - Words: 26,704 - Reviews: 6 - Favs: 9 - Follows: 12 - Updated: 13m - Published: 12/25/2023
Adventure Time: The Big Belly Club by Autonomous Ultra Instinct reviews
After the events of Freak City, Rachel decides to have a fun night with what was once considered a curse placed on her by Magic Man and stabilized by her tiara, leading to the creation of the most unusual club.
Rated: T - English - Romance/Humor - Chapters: 1 - Words: 1,935 - Reviews: 2 - Favs: 5 - Follows: 3 - Published: 2/18 - [Finn, OC] [Simon P., Betty]
Something More by Bazinga007 reviews
18 year old Finnegan Campbell lives on Founder's Island with his mom, but through a series of unfortunate events, he winds up on the shores of Ooo. And becomes a Helper in ways he never thought were possible.
Rated: T - English - Adventure/Family - Chapters: 48 - Words: 333,476 - Reviews: 699 - Favs: 658 - Follows: 655 - Updated: 2/17 - Published: 11/23/2020
Family by Major144 reviews
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 Ooo will rise and take shape. Also there will be many crossovers.
Rated: T - English - Adventure/Family - Chapters: 503 - Words: 1,319,475 - Reviews: 2067 - Favs: 644 - Follows: 560 - Updated: 2/17 - Published: 9/20/2014 - Finn, Marceline A., Betty, Simon P.
Lemmy by ManyStrokes4ManyFolks
Lemongrab bitter-sweetly reflects on he and his mother's past and present relationship.
Rated: K+ - English - Angst - Chapters: 1 - Words: 1,240 - Published: 2/14 - Princess B. Bubblegum, Earl of Lemongrab - Complete
Why Can't We Just Patch Things Up? by Writing-A-Rocket
The doting princess of the land of confections puts Lemony Dumpty back together again-while tearing her baby apart once more with her words. It may have been rare for her to actually scold him, but it only hurts that much more because of it.
Rated: K+ - English - Angst - Chapters: 1 - Words: 642 - Published: 2/11 - Princess B. Bubblegum, Earl of Lemongrab - Complete
The road of heroes by Titan GARO
Tiema has super powers. When he was young, he used this power to do many bad things, but after his brother Bai Wunan died to save the world, he was moved by this incident, so Tiema changed himself and became a good person. Later Tiema died to save his uncle Baichou, but he came to another world and met Finn. He would teach Finn how to be a hero.
Rated: T - English - Adventure/Friendship - Chapters: 3 - Words: 10,255 - Favs: 2 - Follows: 1 - Updated: 2/9 - Published: 1/18 - Finn, Jake, OC
Adventure Time: Zyro the Dragon by martin.ng649 reviews
Zyro is a young dragon who becomes the adopted brother of Finn and Jake. Together, these unlikely heroes will embark on many adventures in The Land of Ooo while fighting off evil, meeting new people, and discovering secrets of the past.
Rated: K - English - Adventure/Fantasy - Chapters: 3 - Words: 10,907 - Reviews: 6 - Favs: 9 - Follows: 10 - Updated: 2/8 - Published: 12/22/2023 - Finn, Jake, Princess B. Bubblegum, OC
Adventure Time with Finn, Jake, & Rachel by Autonomous Ultra Instinct reviews
Join Finn, Jake, and Ice Princess Rachel as they embark on their many mathematical adventures as they strive to keep Ooo safe as righteous heroes.
Rated: K+ - English - Adventure/Humor - Chapters: 15 - Words: 81,889 - Reviews: 41 - Favs: 28 - Follows: 22 - Updated: 2/5 - Published: 11/23/2023 - [Finn, OC] Jake, Princess B. Bubblegum
Finn the Vampire by Heisenbones reviews
Had this on AO3 and might as well put it here. Something something Marceline prank, something something gone wrong. News flash Finn became a vampire and is now going on a carnage spree. Will he regain his sanity before it’s too late? Or will he be a rabid animal until he dies? Idk I’m writing this as I go so let’s find out.
Rated: T - English - Supernatural/Mystery - Chapters: 2 - Words: 10,108 - Reviews: 5 - Favs: 9 - Follows: 13 - Updated: 2/4 - Published: 1/25 - Finn, Jake, Marceline A.
Bubbline Adoptive by Otar3000 reviews
The land of OOO is a free place for everyone to roam around. Dogs, penguins, humans, wizards, vampires and princesses... It's also one filled with extraordinary cataclysms... This is true especially for it's two residents, Marceline Abadeer and Bonninbel Bubblegum who found themselves with a peculair child on their hands...
Rated: K - English - Family/Adventure - Chapters: 7 - Words: 17,893 - Reviews: 4 - Favs: 12 - Follows: 9 - Updated: 1/31 - Published: 12/20/2022 - Marceline A., Princess B. Bubblegum, OC
Finn x flame princess by ricecakea reviews
Red and Blue, (flame princess and Finn) is basically a really dramatic and romantical story that is presented in an AU where they don't know each other.
Rated: K+ - English - Drama/Romance - Chapters: 3 - Words: 829 - Reviews: 4 - Favs: 1 - Follows: 1 - Updated: 1/27 - Published: 1/26 - Finn, Flame Princess, Jake, Princess B. Bubblegum
The Guardian's Confession by SilverXSilver reviews
Post-Fionna and Cake. In the quiet of the Candy Kingdom Tavern, Simon waits for Marceline to arrive for a conversation long overdue.
Rated: T - English - Hurt/Comfort/Family - Chapters: 1 - Words: 2,134 - Reviews: 2 - Favs: 7 - Follows: 1 - Published: 1/17 - Marceline A., Simon P. - Complete
You're Just My Problem Adventure Time Marceline X OC Alexis by destinycopley13
Alexis was always gifted ever since her birth. For Alexis her life has never been easy. She has always blessed with beauty and a strong will. Even with her grace and beauty she has never truly known love. What will happen now when she runs into Marceline? What will happen? Read on to find out. I OWN NOTHING BUT MY OC DESCRIPTION AND MAKING THIS STORY!
Rated: K+ - English - Romance/Fantasy - Chapters: 6 - Words: 6,642 - Favs: 3 - Follows: 2 - Updated: 1/16 - Published: 1/11 - [Marceline A., OC] - Complete
Goodbye by FinnHDA45
The former OOO hero's time has come to an end, he will soon be reunited with Jake but first he must say goodbye to a special person.
Rated: T - English - Romance/Angst - Chapters: 1 - Words: 1,160 - Favs: 1 - Follows: 1 - Published: 1/16 - Finn, Fionna - Complete
Crimson Correction by TheKopp3Katt
The first verse came to me one night, never did anything with it until now. Why is Marceline so cool?
Rated: T - English - Poetry - Chapters: 1 - Words: 89 - Published: 1/9 - Marceline A. - Complete
Ooo, meet Aaa by aimsknight06 reviews
After a freak magic ceremony, Ice King's fanfiction comes to life and everything spills into Ooo! What hijinks and shenanigans will ensue?
Rated: K+ - English - Adventure/Friendship - Chapters: 15 - Words: 27,984 - Reviews: 19 - Favs: 73 - Follows: 70 - Updated: 12/30/2023 - Published: 6/2/2015 - Finn, Fionna
Cyrus Kooper: Reign of the Vampires by martin.ng649 reviews
The world has been taken over by vampires and the human race is nearly wiped out. Cyrus Kooper, a survivor of the vampire onslaught finds himself becoming an unlikely hero. With help from his new friends and allies, Cyrus must fight for both his life and his fellow humans as he eliminates the vampires while being pursued by The Star.
Rated: T - English - Adventure/Supernatural - Chapters: 3 - Words: 5,889 - Reviews: 4 - Favs: 10 - Follows: 5 - Updated: 12/26/2023 - Published: 11/10/2023 - Princess B. Bubblegum, Marceline A., Huntress Wizard, OC
Drunk Night Out by borneobrian reviews
Marceline takes a drunk Bubblegum home after a night on the town.
Rated: T - English - Romance/Humor - Chapters: 1 - Words: 1,398 - Reviews: 1 - Favs: 1 - Published: 12/26/2023 - Princess B. Bubblegum, Marceline A., Peppermint Butler - Complete
El Escultor de Realidad by Lobo Hibiky reviews
La existencia de Fionna y Cake se ve afectada de pronto por la intromisión de personas de otras dimensiones; mientras Simon intenta seguir con su vida. El problema es que ambas cosas parecen estar relacionadas.
Rated: T - Spanish - Adventure/Mystery - Chapters: 1 - Words: 3,854 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 12/16/2023 - Fionna, Huntress Wizard, Prismo, Simon P.
The Snow Prince by Antman502 reviews
The Ice Crown, the very foundation of Simon Petrikiov's magic and madness, but it didn't need to be that way. Anything could be conquered, with the right equipment. Urgent Evergreen the creator, knew of the crown's power, and how best to protect oneself against it. Even millions of years later his very technology still exists, ready to aid the bearer of the crown.
Rated: K - English - Drama - Chapters: 4 - Words: 10,877 - Reviews: 14 - Favs: 47 - Follows: 62 - Updated: 11/29/2023 - Published: 10/17/2023 - Finn, Ice King, Marceline A., Simon P.
Finn Campbell by GentleNight reviews
This story takes place in an alternate timeline where Martin leaves his son behind as he escapes the Isles. Rather than going on fantastic adventures every day with his magical dog, Finn is raised to be a Helper within human society. Finn becomes a Campbell. This story is darker than the main series of events. Be prepared for a slow burn as Finn descends into madness.
Rated: T - English - Tragedy/Romance - Chapters: 1 - Words: 12,025 - Reviews: 10 - Favs: 20 - Follows: 21 - Published: 11/6/2023 - Finn, Minerva C.
Mi Sabor Favorito by AliceLawrenBlack72 reviews
Marshall Lee deseaba averiguar si los labios de Fionna eran tan dulces como sus amadas fresas y vaya que lo haría, aunque la rubia lo intentase asesinar por ello. Menos mal que ya estaba muerto...
Rated: T - Spanish - Romance/Humor - Chapters: 1 - Words: 962 - Reviews: 2 - Favs: 3 - Follows: 2 - Published: 10/27/2023 - Marshall Lee, Fionna - Complete
Turbulence by Tophatman reviews
What happens a normal kid dies and finds themselves reincarnated in their favorite show as the brother of the future queen of vampires herself. A lot of stuff, some good some bad. But one thing is for sure, a lot will change. (SI-OC)
Rated: T - English - Fantasy/Romance - Chapters: 25 - Words: 61,472 - Reviews: 113 - Favs: 211 - Follows: 231 - Updated: 10/9/2023 - Published: 5/3/2023 - Marshall Lee, Marceline A., Marceline's Mom, Hunson Abadeer
To Warm Thy Heart by ARCHIVEACCT8264 reviews
I don't know when I'll work on this again.
Rated: T - English - Hurt/Comfort/Romance - Chapters: 4 - Words: 3,397 - Reviews: 1 - Favs: 3 - Follows: 2 - Published: 10/5/2023
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