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Worlds above the Underground (Rewrite) by bopdog111 reviews
(Rewrite of Ulrich's idea) Frisk Dreemurr did the impossible and freed the monsters from their prison under Mt. Ebott. She saved all of monster kind and even went the extra mile to try and bring back Chara and Asriel and succeeded. Now on the Surface the three Dreemurr children have a new goal, becoming three great Entertainment Duelists. Co-Write with Ulrich362
Crossover - Yu-Gi-Oh! Arc-V & Undertale - Rated: T - English - Suspense/Adventure - Chapters: 17 - Words: 104,575 - Reviews: 2 - Favs: 19 - Follows: 17 - Updated: 8/16 - Published: 2/8/2021 - [Yuya S., Frisk] [Yuzu H., Asriel]
Error 404 is curious about MHA by wolffrankie.14 reviews
error 404 finds out about my hero Academia, and is curious about the world and even surprised. but he isn't one of the first undertale gods to find out about this universe.
Crossover - My Hero Academia/僕のヒーローアカデミア & Undertale - Rated: T - English - Chapters: 8 - Words: 2,999 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 8/13 - Published: 8/9
The Memoir of Frisk by dafid1 reviews
What if Frisk went to the world of Fairy Tail?
Crossover - Fairy Tail & Undertale - Rated: K+ - English - Adventure/Friendship - Chapters: 5 - Words: 5,638 - Reviews: 5 - Favs: 17 - Follows: 21 - Updated: 8/12 - Published: 6/5
The Accords of Madness: 17: Madness Abound in the Underground by TaleBearer42Day
When Sheogorath sends Karlemagne to a world of trapped monsters with nothing but Gambolpuddy, it's mostly to see whether or not it'll be a 'fun vacation spot'. One thing leads to another, and very soon SAVES and RELOADS, NEUTRAL and PACIFIST endings all come together for one final moment that forever earns this Tale a spot in the Accords of Madness.
Crossover - Elder Scroll series & Undertale - Rated: K+ - English - Adventure/Angst - Chapters: 2 - Words: 10,667 - Favs: 1 - Follows: 1 - Updated: 8/12 - Published: 7/28 - Sheogorath, OC, Frisk, Asriel
Cuptale (CupheadxUndertale) by Kale Bishop reviews
Mt Abott suddenly appears out of nowhere and Cuphead, dragging Mugman along, runs to the mountain to investigate. Soon they fall into the chasm and are attacked by the monsters of the underground. As they explore, they discover a tragedy that befell the underground, make friends along the way, and have a bro jolly fun adventure of a lifetime. Cover photo by me.
Crossover - Undertale & Cuphead - Rated: K+ - English - Adventure/Fantasy - Chapters: 7 - Words: 50,992 - Reviews: 4 - Favs: 23 - Follows: 19 - Updated: 8/11 - Published: 7/16/2021 - Papyrus, Sans, Cuphead, Mugman
Brave Devil Fist by Son of Nightmare reviews
Before crashing the wedding, Issei has been having dreams of another life. A life of talking skeletons and fighting monsters. He now wishes to regain his memories and help those that truly need a true king, Ravel and others. His SOUL is filled with BRAVERY. (Evil Rias and Dusttale Sans) Martial Artist Issei! Issei x Ravel x Riser's Peerage Harem
Crossover - High School DxD/ハイスクールD×D & Undertale - Rated: M - English - Adventure/Romance - Chapters: 12 - Words: 24,997 - Reviews: 18 - Favs: 95 - Follows: 119 - Updated: 8/10 - Published: 5/7/2021 - [H. Issei, Ravel P.] Yubelluna, Orange Soul
Ralsei's Salon by Dragonsrule18 reviews
Frisk desperately needs a haircut. Ralsei offers to help. A little fluffy friendship oneshot set after the events of the second book in the Hopes, Dreams, And DELTARUNE series.
Crossover - Undertale & Deltarune - Rated: K+ - English - Friendship - Chapters: 1 - Words: 1,244 - Reviews: 3 - Favs: 4 - Follows: 2 - Published: 8/4 - Frisk, Ralsei - Complete
A Devil May Fall by Burning burning burning reviews
For so very long, he's been forced to fight to stay alive and to gain power. But when Vergil arrives upon a society of demons who challenge him in contests of strength and character, he must learn to see beyond the surface of their beings. And eventually, see himself for who he really is. "I need... More power."
Crossover - Devil May Cry & Undertale - Rated: M - English - Spiritual/Adventure - Chapters: 21 - Words: 161,624 - Reviews: 54 - Favs: 52 - Follows: 66 - Updated: 7/31 - Published: 6/16 - Vergil, Chara, Asgore D., Asriel - Complete
When There's a Whip, There's a Way: Remastered by GreaterAxelord reviews
The Bloodline had been tainted, cursed. Redemption was assumed to be well beyond the means of Richter after the atrocities he had committed under the control of the Dark Magician Shaft. But Fate gave him one more chance, one final attempt to reconcile with the past. (This is the remastered and remade version of my old story posted here, progress is ported from my AO3 Account)
Crossover - Castlevania & Undertale - Rated: M - English - Drama/Adventure - Chapters: 9 - Words: 79,250 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 7/27 - Death, M. Librarian, Richter B., Asriel
The Mountain of two Legends! by bopdog111
Frisk succeeded in freeing the Underground from the Barrier, and all is freed back to Tamriel... too much they see is wrecked with strife from the Thalmor, and now a Dragon Menace. Teamed up with Jin, a former Soldier of the Imperial Empire, and the fated Dragonborn, they all travel to stop the Dragon Meance, and the Thalmor in a unlikely alliance. (Pairings Undecided)
Crossover - Elder Scroll series & Undertale - Rated: T - English - Family/Adventure - Chapters: 6 - Words: 32,789 - Favs: 4 - Follows: 5 - Updated: 7/26 - Published: 6/30 - Dragonborn/Dovahkiin, Delphine, Frisk, Chara
Underleague by sen whitefox mako red demon reviews
Here we are we made it. The Underleague, the most difficult challenge for any pokemon champion out there. 8 Gyms, 4 Elite members, 1 ultimate pokemon master. Their latest opponent? A...ten year old kid, without a license and and little eevee...Um is-is this normal? Oh, so your Frisk and you literally fell down here? Well in order to get out you have to go through the league. Sorry
Crossover - Undertale & Pokémon - Rated: T - English - Adventure/Family - Chapters: 45 - Words: 91,825 - Reviews: 51 - Favs: 109 - Follows: 119 - Updated: 7/25 - Published: 9/11/2016 - Frisk, Asriel, Papyrus, Sans
Where The Lost Become Found by PipertheViper reviews
Harry is abandoned on Mt. Ebott by his aunt. Toriel left her husband after their two children died. Alone, they are broken and lost souls. Together, they are a family. (A Toriel raises Harry fanfic.)
Crossover - Harry Potter & Undertale - Rated: T - English - Family/Hurt/Comfort - Chapters: 2 - Words: 1,514 - Reviews: 79 - Favs: 325 - Follows: 381 - Updated: 7/24 - Published: 4/7/2016 - Harry P., Toriel
Sonic Underground by ShootingStarStories2
A mysterious space pod crashes into Mt. Ark, containing a black hedgehog with no recollection of his past. It is up to Shadow to figure out the tale of the mobians and choose a path, This is a UT AU.
Crossover - Sonic the Hedgehog & Undertale - Rated: T - English - Humor/Tragedy - Chapters: 1 - Words: 216 - Published: 7/23 - Sonic, Tails, Shadow, Dr. Robotnik/Dr. Eggman
Under the Veil by poplasia reviews
Sans has gotten himself stuck in the void between worlds in a successful attempt to stop the resets of his timeline. He's not sure how long he's been chillin' alone there, but eventually a chance at escape stumbles his way in from the Veil of Death. His name?—Sirius Black. (no pairings)
Crossover - Harry Potter & Undertale - Rated: T - English - Fantasy/Humor - Chapters: 65 - Words: 225,069 - Reviews: 2145 - Favs: 2,255 - Follows: 2,559 - Updated: 7/18 - Published: 8/1/2016 - Sirius B., Sans
Maelstromtale by hussbek reviews
Stories speak of a mountain where children have gone and never returned, unknown of the mystery which lies within it. Now history repeats itself as a child falls but with a twist as another joins...and to think a mild stroll got him into something thought of as fairy tales.
Crossover - Naruto & Undertale - Rated: T - English - Adventure/Supernatural - Chapters: 16 - Words: 106,895 - Reviews: 139 - Favs: 320 - Follows: 375 - Updated: 7/15 - Published: 5/25/2020 - Naruto U., Frisk
Children of Darkness (Soul of Void) by LuAO0 reviews
For ages, the Void godness has to sit and see how her multiverse was fill and filled by AUs of her Universe, Undertale, she hated them at first, but now all her hate fall in their creator, Fate's spawn, Ink. Meanwhile, in another Multiverse, other Void God makes a deal with the ruler of Hallownest.
Crossover - Undertale & Hollow Knight - Rated: T - English - Hurt/Comfort/Family - Chapters: 15 - Words: 33,469 - Reviews: 8 - Favs: 54 - Follows: 62 - Updated: 7/14 - Published: 1/31/2021 - Sans, The Hollow Knight, the Knight
Aster Chronicles: Convergence by Eraclese reviews
Those who would tamper with fate will meet one beyond their hopes and despair. Those who would seek to make a better world will always have the misfortune of never living within it. Some might not have a choice, however. A choice to live a happy life. A choice to tamper with fate. Or a choice to destroy the world. Not all are fortunate enough to choose their fates.
Crossover - RWBY & Undertale - Rated: K - English - Adventure/Fantasy - Chapters: 1 - Words: 1,929 - Reviews: 6 - Favs: 16 - Follows: 20 - Updated: 7/11 - Published: 2/5/2021
Skeleton monster of Beacon by CykaBlyatintensifies reviews
During the absolute genocide run, Sans killed the human. Instead of letting their soul shatters, he took the shards and absorbed it. After absorbing the soul, he turned into a human and absorbed the other 7 to break the barrier. He then found himself in an anime-ish world. Now, he must fight against a darkness that lingers in this world. Finally, the art is not mine.
Crossover - RWBY & Undertale - Rated: T - English - Humor/Hurt/Comfort - Chapters: 25 - Words: 74,872 - Reviews: 54 - Favs: 227 - Follows: 274 - Updated: 7/10 - Published: 9/28/2020 - Sans, Team RWBY, Team JNPR, Chara
Copy Cat! Or Bear- by GlitterdragonTGPOU YT
Fredbear had been through a lot in the underground, and now Springbonnie is no longer the person he once knew... but Fredbear learns there's a monster that can help.
Crossover - Undertale & Five Nights at Freddy´s - Rated: T - English - Angst - Chapters: 1 - Words: 1,159 - Published: 7/7 - Fredbear, Springtrap - Complete
Madokatale by Finalcool720
in this tale madoka falls down into the underground and has the power to save and reset and each time she does someone else is with her and monsters do not want to fight her ( M for future chapters )
Crossover - Puella Magi Madoka Magica/魔法少女まどか★マギカ & Undertale - Rated: M - English - Chapters: 3 - Words: 2,448 - Favs: 1 - Follows: 1 - Updated: 7/5 - Published: 3/31/2021 - Madoka K., Frisk, Flowey
Crimson Hunt by TheOriginalTale reviews
When a hiking accident sends Frisk to the depths of Mount Ebott, he's forced to adapt to his new surroundings. Meanwhile a restless prince seeks for adventure...and a new visitor just might provide the means to fulfill his cravings.
Crossover - Undertale & Deltarune - Rated: T - English - Adventure/Fantasy - Chapters: 17 - Words: 33,977 - Reviews: 2 - Favs: 7 - Follows: 13 - Updated: 7/5 - Published: 9/28/2021
UnderShield by Bloodwolf11 reviews
Naofumi ends up in the Underground with no idea how he got there or what he was trying to do before that. What will he do in a world where the monsters are trapped and the key to their freedom is taking his soul?
Crossover - Rising of the Shield Hero/盾の勇者の成り上がり & Undertale - Rated: T - English - Fantasy/Humor - Chapters: 6 - Words: 39,751 - Reviews: 31 - Favs: 146 - Follows: 173 - Updated: 7/4 - Published: 9/12/2021 - Naofumi I., Papyrus, Sans, Toriel
Cuphead In Undertale by jdeese
What if Mt.Ebbot was in Inkwell Isle 3
Crossover - Cuphead & Undertale - Rated: M - English - Adventure/Supernatural - Chapters: 1 - Words: 188 - Published: 7/2 - Cuphead
Hopes, Dreams, And DELTARUNE, Book 2: Cyber World by Dragonsrule18 reviews
Frisk and Susie are left reeling from their adventures in the Dark World, but there's no time to take a deep breath. As the Knight blows another fountain open, Frisk and Susie, along with little sister Tina, Berdly and Noelle, must seal it and stop an "evil" queen from taking over. And who is the man beckoning from Frisk's dreams, the one who speaks in hands?(MAJOR UPDATE TO Ch 13)
Crossover - Undertale & Deltarune - Rated: T - English - Adventure/Friendship - Chapters: 13 - Words: 91,606 - Reviews: 47 - Favs: 15 - Follows: 17 - Updated: 6/30 - Published: 1/8 - Frisk, Noelle Holiday, Ralsei, Susie - Complete
I Am Frisk: An UndertaleWorm CYOA Story by Tempest2077 reviews
After waking up in the body of the protagonist of Undertale. The newly named Frisk has to find a way to deal with the consequences of actions he doesn't even remember taking. And find a way to not only save the underground, but also himself.
Crossover - Worm & Undertale - Rated: M - English - Adventure/Fantasy - Chapters: 7 - Words: 14,345 - Reviews: 4 - Favs: 30 - Follows: 40 - Updated: 6/28 - Published: 6/27 - OC, Papyrus, Sans, Toriel
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