1 - 20 of 829 Works in Starlo (Undertale Yellow - Master Sword)
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Return To Form by EnemyCactus
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game)
14 Dec 2025
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Summary
The barrier was shattered and monsterkind finally got their freedom, but what of the humans that came before?
They deserve a happy ending too.
But with so little power left remaining after destroying the barrier, a half-measure would have to be taken.
Better than nothing, right? And for some of them, much more preferable to how they were before and certainly during their deaths.
The Sixth and final SOUL is the last to awaken, and by that point, things have been quiet in the Underground for quite a while.
But there is still one more thing to be done, one more person to save, and in many ways they're tied to that Sixth SOUL as well as the Underground's self proclaimed caretaker.
A second chance and a happier life awaits Clover and Kanako if they can just grasp it.
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Deliverance From Self-Destruction by Agent_ArcticFox
Fandoms: Undertale Yellow (Master Sword Video Game)
14 Dec 2025
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Alexander Koskinen is not a perfect man, but he’s lived his life to what he believes is the best he could. But after falling into the underground, that belief is shattered, and the guilt that has built up over the years has come crashing down, a weight he can no longer bear alone like he has for so long. Now it’s up to Chujin Ketsukane, patriarch of the Ketsukane household, to help pick up the pieces of this lost soul’s life, lest he be consumed by the past that’s been haunting him for all these years.
Series
- Part 1 of UTY: Absolution
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UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
13 Dec 2025
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It's been a few years since Monsters returned to the Surface and lots of things have changed... Accompany your favorite characters from Undertale, Undertale Yellow and Deltarune as they try to manage their everyday responsibilities and go through a few wacky adventures while at it in this slice-of-life crossover AU.
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Three years ago, a brother left his sister to search a mountain that no human has ever returned from.
Three years later, the sister, desperate for answers, follows her brother's footsteps.
The two meet again, but the result is likely the most hectic two weeks of their lives. And one of them has already lived an eventful life.
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Consequence by Anthrax13
Fandoms: Deltarune (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune Yellow - Fandom
13 Dec 2025
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An Angel scorned, with tears of fire;
The bitter path; of thorny mire;
All countdown to the Earth's expire.A soul of Justice; borne true and bright.
One of Compassion; with monstrous might.
Usurped from deepest, darkest black;
A Prince of hollows, bearing lack.Two Hearts;
Two Ends.
They play their parts,
In rage-wrought bends.
From burning vengeance, a twisted boon;
Faux transcendance, of DELTARUNE. -
Clovers and Feathers by WaxedLightlyWeatheredCutCopperStairs
Fandoms: Undertale Yellow (Master Sword Video Game)
13 Dec 2025
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It's been a week since Clover chose to live with Martlet after the grand confrontation against the 'Roba. Hijinks occur.
or: i make bird-human fluff bc i need more
edit: oh god it's a full story now
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The ‘figuring it out’ part by Doesntmatterreally
Fandoms: Undertale Yellow (Master Sword Video Game)
13 Dec 2025
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Summary
An unexpected, somewhat Kafkaesque change leaves Martlet doubting her own identity. She was always the talkative and expressive one, a bit of a scatterbrain. Now all she’s seemingly allowed to have is that last part, the part she honestly would’ve preferred to be thrown out the window instead. She’s not sure how to deal with this until her favorite kid and their favorite manchild show up at her door and offer their help. Well, this was ultimately unavoidable, wasn’t it? Now she has to adjust to her new reality until maybe one day she can recognize herself again.
Series
- Part 2 of Martlet, just different
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Justice Evolved by The_Spar1an
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game), Undertale Red & Yellow (Video Game)
12 Dec 2025
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Summary
Clover remembers.
After spending quite some time dead, He finds himself with memories he'd rather not have.
Memories that tell him who he truly is.
Memories that haunt him.
edit: lowkey put me on the stuff I was on when I wrote this summary.
Anyway, basically Clover remembers resets, especially genocides. So he basically remembers how to use his powers from previous runs as well, and then la tee doo dee dum, and bam. Justice Evolved.
If you're curious enough to have questions, maybe read the fic. It'll boost my ego. (please)
(edit 2) Disclaimer: if you want to read for cocoapowder, cocoapowder chapters will be released at a later date. As of this edit, the relationship between Clover and Chara has yet to be explored.
(edit 3) despite "Teen and up Audiences" rating, please note that It's catered more towards 14+ ages.
------------------------------This work will contain Original characters for the sake of worldbuilding, which WILL play major roles in the story.
This is an alternate universe to Undertale Red and Yellow.
This work will be from Clover's POV. (written in first person, not second person, aka "I" instead of "You") -
Call for Justice by TheDoctorWD
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game), Deltarune (Video Game)
12 Dec 2025
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Monsterkind is finally free. Everyone is at the surface now. A happy ending is it not? To the little cowpoke’s surprise he is alive again! And it seems he was not the only one that was brought back to life.
Clover may not know why he’s alive again but one thing for sure is that going on another adventure wouldn’t hurt him at all, it’s time for him to bring Justice once again. Meanwhile the darkness seems to grow darker, yet darker.
Series
- Part 2 of Fractureverse - UT/UTY/DR
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UNDERTALE YELLOW - CORRUPTED HEARTS by Mortisblade
Fandoms: Undertale Yellow (Master Sword Video Game)
12 Dec 2025
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CLOVER, what would happend if Clover never gave up their soul in time. What if they've lived? What if that one action changed everything.
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Save a Horse, Ride a Cowboy by average_alternative
Fandoms: Undertale Yellow (Video Game), Undertale (Video Game)
12 Dec 2025
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Living in the Wild East with Starlo was great. For the first time in a long time, you found yourself truly happy. It seemed like coming to the Underground was the best decision of your life.
That happiness is threatened when the Asgore finds out that a human has been living in his kingdom for months without being caught.
OR:
I turn my fic that originally started out as smut oneshots into a fleshed-out story with angst, fluff, and yes... still more smut.
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Unavoidable Outcomes by Crystalight532
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
11 Dec 2025
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The Multiverse isn't as unreachable as one might think. Sometimes, all it takes is one aware person to tip the scales for another to find out about it. But when one isn't ready for it, returning to their own world is relieving and best for the psyche.
Humanity's thirst for knowledge is near insatiable. How far would they be willing to go to learn more about their new magical coinhabitants on the surface? How far would they go if they could weaponise their magic?
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Clover's (belated) Birthday by MoruMoru
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
11 Dec 2025
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What was a typical day out for Clover and Kanako ends with something truly worrying. Kanako realises both friends and family have made a horrible mistake, and have been ignorant about something for much too long.
It's only fair to right this injustice! It's only fair to correct this dastardly mistake!
Clover... it was Clover's special day!
Series
- Part 3 of MoruMoru's UTY collection
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Corruption Tale by TimeWitchHilda
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
10 Dec 2025
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What of instead of the Human Monster War A Virus took hold that slowly corrupted the Humans and Monsters of the world? What if When Chara Fell Into the Underground She merged with Asriel to try to save the world above? What if when every Human fell They tried to escape the corruption above? What if the Barrier was meant for a safe place instead of an imprisonment? All of these questions will be answered with Frisk who knows somethinf about the Virus that no one else knows. Maybe it's even something Chara knows to. Will these two Humans whose lives are a Century apart manage to save both the Underground and The Surface of this evil Virus?
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Hello I recently got into Friday Night Funken and I saw an AU with this Corruption story. And I think of doing something similar but not quite the same either. I hope you all enjoy.
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Another Angel by Electric_Wind
Fandoms: Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
10 Dec 2025
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My attempt at the "Deltarune Yellow" concept, a world where familiar characters from the beloved fan game are living on the surface with ever so slightly different lives. Given another chance, a failed soul ventures back into the world of Deltarune, but finds itself in unexpected story. How will the prophecy unfold with a new trio of heroes? Will they be strong enough to stop the roaring? Will they live up to the prophecy's demands? Only time will tell.
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A controller's dismissal by Sirsonan
Fandoms: Undertale Yellow (Master Sword Video Game)
09 Dec 2025
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Flowey wasn't going to RESET Clover this time. Even he has his limits before his patience runs thin. Although time RESETs anyways. Flowey figures out who used HIS powers and scares them into leaving. This run faces the consequences of that action.
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Long ago on the surface as the light of the sun gave protection. Humans and monsters live in peace and humility side by side, as days pass and the small village starts to advance. A sickness struck, humans baffled by this as they struggled to find a reason why as the ill became fatalities. The odd part as none of the monsters became sick, anger on one side bled into the other when an irredeemable action was made and war started. irreversible damage on both sides as it escalated. The Queen of Monsters as a last resort tried to plead mercy with humans of the village. After the case was solved, they agreed with the monsters being sealed down.
Tragedy struck monsterkind, the King of Monster declared war on humankind with the goal of getting 7 human souls. With the disappearances, humans fought back and with the amount of lives lost, the ones with the strongest [DETERMINATION] able to be contained.
Years later the war was forgotten as civilization advanced. The missing cases caused in MT. Ebott made them put up warning signs warning anyone from venturing into it as a way of preventing.- Language:
- English
- Words:
- 4,279
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 81
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Someone powerful is tired of the bad endings. Time to take fate into their own hands.
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Balancing the Scales of Justice by Metal_Omegux
Fandoms: Undertale (Video Game), Undertale Yellow
09 Dec 2025
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"You know, normally, I like to resolve things peacefully. However, I got a hunch that ain't gonna work for ya. So, prepare for some supreme justice."
Frisk's genocide has almost been completed. Sans, Asgore, everyone; reduced to dust. However, there's one more opponent Frisk failed to anticipate; a foe even tougher than a true heroine or comedian. Across from Frisk stands a gunslinger who is the dictionary definition of justified! And their name… is Clover.