1 - 20 of 1,201 Works in Undertale Yellow (Master Sword Video Game)
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The Sentinel of Silence by Otherone1216
Fandoms: Undertale (Video Game), Undertale Yellow, Batman - All Media Types, Batman: Wayne Family Adventures (Webcomic), DCU (Comics)
20 Oct 2025
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Summary
As Clover walks through the broken streets, and decayed alleys, and frightened people, and the superstitious and cowardly underbelly of a wounded, crying city, they are witness to an eternal truth: Justice is severely needed.
In other words, Clover goes to Gotham City.
“Clouds and thick darkness are all around him; righteousness and justice are the foundation of his throne.”
Series
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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)
20 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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Noelle Becomes Brave by IllegalMeerkat
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
20 Oct 2025
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Summary
The world is on a collision course with the end of everything.
Noelle Holiday is attacked in Hometown while walking home, and after returning home a week later, she knows that something is wrong. Her mother isn't acting right, and there's something out in the woods around her house.
With all of her friends and family holding secrets, the Roaring looming overhead, and the knowledge that the world rests on her shoulders, Noelle forgoes her mental health to make a better tomorrow. She'll get stronger.
Whether her friends let her is another story.
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Under Their Tails by TebTebmylittlepony
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
20 Oct 2025
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Summary
Brought to life again as a big dicked version of The First Human in one of his favorite games, James will make sure his perviness and loving warmth will allow him to get with these strangely lewded up characters, while also making sure not to make the same mistake the original did.
After all, why would he want to leave this Underground?
Notice: First chapter is more of a notice for people that are interested in this fic before I make an actual chapter, if you don't click on it or do and decide this isn't for you, then all I can say is I hope you have a nice day.
Though I'd highly recommend you do so i can clear some stuff up for this fic
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Deltarune: Red & Yellow by youraveragefanficreader1710
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
19 Oct 2025
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Summary
I don't have any vague summary.
But essentially, it's Deltarune with Undertale Red and Yellow sprinkled in.
Kris' SOUL is comprised of three souls, Frisk as the Red SOUL, Chara as the Black SOUL, and finally Clover as the Yellow SOUL.
This AU will also feature UT Yellow characters, integrated into Deltarune. Will they have significance? We'll just have to wait and see...
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Genocidal Ideation by WritingsFromTheVoid
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
19 Oct 2025
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Summary
Chara always hated humans. Well, not exactly “always”, but ever since they could remember they have. For this reason, they fled from humanity. And for this reason, when given the chance, they destroyed their entire world. They are untouchable now, above everything else…
Clover was a normal kid, or well, as normal as anyone who dresses up as a cowboy can be. But they’ve always held human life in high regard. So they fell into the heart of the earth to figure out what happened to so many kids before them. In there, they learned that monsters were real, and in there they learned that not all life held value.
When these two met, it went about as well as you’d guess. But they didn’t meet to fight, and a teenager has big, big plans for them.
ACT ONE: The Device Hunt
Series
- Part 2 of Epiloguetale
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endlessly painstaking and insulting new show. by NeverShrek1ForSomeReason
Fandoms: Roblox (Video Game), キルミーベイベー | Baby Please Kill Me, Fundamental Paper Education (Web Series), Henry Stickmin Series (Video Games), Five Nights at Wario's (Video Games), Cryptoland, Five Nights at Freddy's, Happy Tree Friends, Murder Drones (Web Series), Undertale Yellow (Master Sword Video Game), The Fancy Pants Adventures (Video Games), Undertale (Video Game), Spooky's Jump Scare Mansion, Miitopia (Video Game), Everhood (Video Game), Creepypasta - Fandom, Bug Buddies (Webcomic), OMORI (Video Game), Doki Doki Literature Club! (Visual Novel), Merryweather Media, Baldi's Basics (Video Games), The Amazing Digital Circus (Web Series), Ramshackle (Web Series), Kirby (Video Games), Super Mario & Related Fandoms, Five Nights At Treasure Island (Video Games), Toy Story (Movies)
19 Oct 2025
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pains.
they will never end. -
UDY on the Surface by CommanderBullet
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
19 Oct 2025
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Summary
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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Someone powerful is tired of the bad endings. Time to take fate into their own hands.
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confession time? here's what i got... by MrJoCrafter
Fandoms: Undertale Yellow (Master Sword Video Game), Undertale (Video Game), Deltarune (Video Game)
19 Oct 2025
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Summary
Clover competes in a sharpshooting contest at a carnival game at the urging of their girlfriend, Kanako. There's just one problem: they're a terrible shot.
This was made for a contest, and takes place in a 'verse very similar to my Convergence AU, although it is not canon to that story.
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The fire that won't let me die by anonymousyellowlizard for TGClmao
Fandoms: Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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“That’s not a monster, Kanako,” Chujin puts a hand out for her to take, “That’s a human. Come here, get away from it.”
“It’s not mine…” Quaver mumbles. They look at the kind monster pleading. “It’s not my dust… I had to…”
She moves closer to them.
“Kanako!”
What if Integrity got to survive the Snowdin Incident?
Series
- Part 15 of Kink/Whumptober 2025
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Summary
Just an ordinary trip to the underground.
Oh yeah! And Frisk has the ghosts of all of the past humans in their head! What could possibly go wrong!
Frisk and the humans adventure around the underground, and help to tie loose ends and help each other with their problems.
Series
- Part 1 of Undertale: Sevenfold
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【Clover×You】In the gap of time beyond the reach of sight by Lynna153
Fandoms: Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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Summary
When Clover was observing the stars with a telescope, he saw something unexpected.
- Language:
- English
- Words:
- 7,484
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 31
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Deliverance From Self-Destruction by Agent_ArcticFox
Fandoms: Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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Summary
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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A Ring Away by yeetguy423
Fandoms: Deltarune (Video Game), Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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Battat finally meets Wanda face to face, needing to show her the truth of himself to be able to get the secret he's been holding in off of his shoulders.
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What is Left Behind by EmmaSmoke
Fandoms: Undertale (Video Game), Deltarune (Video Game), Undertale Yellow (Video Game), Undertale Yellow - Master Sword (Video Game)
18 Oct 2025
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Summary
At the end of her first journey, Frisk is confronted by the lingering emotions of the Fallen, including their HATE. Corrupted, Frisk RESETs to slaughter monsterkind.
But at the end of this turn, Frisk regains her freedom. She does more than that, however. She returns life to what has long-since been gone.
Now, Frisk must lead monsters and humans toward a brighter future.
Clover must grapple with the years his spent dead and the weight of his sin.
And Kris watches as the world he’s always known changes drastically.——
Trust me, this story is going to be good. It’s not my fault the tags I need are nonexistent.But prepare for heavy world-building and lots of angst.
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Kleptomaniacrow by Manchaalegre31
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
18 Oct 2025
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Summary
Clover opened their eyes. They could barely remember a few moments from the previous night, and from what little they did remember, two red eyes were always present.
Eyes they felt they had to search for.Or: copowtober day 18 Songfic
Series
- Part 2 of Inside The Skin
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The Caretaker by TiredFurry_hmm
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game)
17 Oct 2025
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Locked away in the lab, Kanako becomes something unrecognizable in both body and mind, turning cold and aggressive. Facing her fears and learning of the true nature of her companions, she becomes a guardian for the amalgamations Alphys barely considers alive. Having no hope for herself, the caretaker of the lab forces the depressed royal scientist to come to terms with just how alive they really are, and how desperate her friends are to go home.
Series
- Part 1 of TiredFurry's UT/UTY Post-canon
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A very, very special festival by Lilycolonthree
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Undertale Red & Yellow
17 Oct 2025
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Summary
Frisk, Chara, and Clover hang out at the festival. A very special time indeed.
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Diving for Justice, Freedom and Managed Democracy by Dangeresque_On_Ice
Fandoms: Undertale (Video Game), Undertale Yellow (Video Game), Helldivers (Video Games)
17 Oct 2025
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Summary
The Monsters were dead.
They must have been, the Federation of Super Earth had said so; annihilated during the Great Galactic War along with all the other threats to Managed Democracy. So Clover was understandably confused when he set out to find the five missing Cadets only to discover a whole society of Monsters sealed underground.
What’s more, these Monsters were nothing like the tyrannical, Freedom-hating killers history had portrayed them as.
Things just weren't adding up. But why? It’s not like Super Earth would have lied, right?
Now with a TV Tropes page: https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/DivingForJusticeFreedomAndManagedDemocracy