14 Works in Land of Ooo (Adventure Time)
Listing Works
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Adventure Tale by Kaboom91
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Adventure Time (Cartoon 2010)
11 Oct 2025
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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!"
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They meet again in a post-apocalyptic land of Ooo, everything is scarce, expect them.
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When Princess Bubblegum becomes increasingly busy helping Lady Rainicorn with daily tasks, Marceline starts to feel left out and jealous. What begins as suspicion and frustration spirals into anger and heartache, leading Marceline to write a song expressing her feelings.
But the situation is far more complicated than it seems.
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Deku's Catalyst by Jackknifedrum
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Adventure Time (Cartoon 2010)
26 Jul 2025
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The Land of Ooo suddenly has a new green haired human. How will Izuku effect Ooo, what new faces will appear, and will he even want to leave?
(I suck at summaries.)
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What Survives the Singularity is Love by helles_belle
Fandoms: Arcane: League of Legends (Cartoon 2021), Adventure Time (Cartoon 2010)
19 Jun 2025
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A thousand years ago, they built a city together.
Viktor and Jayce: scientists, dreamers, almost-lovers. They designed Automnion as a haven after the world fell, a sanctuary of logic and light where no one had to die young. But when raiders breached the city walls and Viktor was gravely wounded, Jayce broke their last promise. He hexcorized Viktor to save him, binding soul to circuitry, man to machine. In doing so, he unleashed something ancient and irreversible. The Lichcore was born.
Viktor left. When he returned, the city still stood... but Jayce was gone.
Now, centuries later, Automnion sings with ghost-code and corrupted lullabies. Automatons quote lost poetry. The defenses tremble. Viktor, more machine than man, keeps the systems running and waits in the silence for a presence he can no longer name without pain.
Somewhere beyond the wasteland, something stirs. A storm-wrapped figure with a hammer that rings like a funeral bell. A crownless king who does not know if he’s searching for a city or for someone he loved before he went mad.
However, the circuits of Automnion remember...
And they cry for their king's return. -
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a tree
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Between the Static by VigilantShadow
Fandoms: Adventure Time (Cartoon 2010), Professional Wrestling, All Elite Wrestling
17 Mar 2025
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Princess Bubblegum acquires a television she suspects might have a living entity inside it. Unable to leave a mystery alone, she sets about making contact with the lonely starlet known as Toni Storm.
Series
- Part 4 of AEW Prompt Fills
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The Alchemy of Hearts by beabadeer (orphan_account)
Fandoms: Adventure Time (Cartoon 2010)
11 Jan 2025
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A traveling potion merchant arrives in Ooo selling "Heart Elixirs"—a potion to reveal one's true feelings. Princess Bubblegum is skeptical about this and Marceline is an impulsive buyer.
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I decided to make this out of the blue. I have no idea what direction its going in. If anyone has any suggestions for new chapters feel free to leave suggestions.
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HOSTS: An Adventure Time fanfic by Voidofthevoidmv
Fandoms: Adventure Time (Cartoon 2010), Adventure Time: Fionna and Cake (Cartoon 2023)
04 Mar 2024
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"It all begins with a wish" Basically, in another universe where Fern actually prevents Sweet Pea from going to the Well of Power- Meaning he isn't there to stop the Lich from killing Finn. But the thing is, The Lich decides to possess Finn and use his reputation and trustworthyness in his favor. From the perspective of rising hero Fern ( Because I love him-) Watch as the story unravels from there, and it's up to him to save the multiverse. He makes and remakes a lot of friends along the way. But this story will not end without spilled blood... This is: Hosts. (Terrible description- Just know Finn dies and a bunch other characters die. BUT FERN AND NEPTR FREIENDSHIP FOR LIFE!!!)
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A thousand years ago, the Great Mushroom War transformed Earth forever, birthing a New Age. From the mutagenic wreckage was born Princess Bonnibel Bubblegum, and since then, she has striven to build a New World from the ashes and detritus of the Old. For a thousand years, she's watched over and guided the Candy Kingdom as Ooo grew around her.
This is her story.
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Our Journeys! by PinkStorm
Fandoms: Rizzoli & Isles, She-Ra and the Princesses of Power (2018), Adventure Time
22 Jul 2020
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Varieties of one-shot AUs in each fandom category. No crossovers at this time, maybe later?! Follow along this journey with your favorite fandoms or with all of them! First time working at this so, yep your comment input can help me out...
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What happens when Finn and Fionna get switched between OOO and AAA thanks to the Ice Queen and King. How will they get back and how will they be able to adjust to this strange "new" world?
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The King and Queen of the Candy Kingdom always longed for a child. When their wish is finally granted, it is taken away just as easily. And so begins the journey of a princess who will learn that size doesn't matter because she has a lumping kingdom to help run and parents to get back to.
Series
- Part 1 of The Happily Ever Afters