Undertale Crossovers
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SnAns and read Riding hood sace the e with Nostalgia Crittc by MrTheB reviews
This sotory has unintentional duaguise vore, Napolean Bonapaet speaking english ,mental issues, crowdfunded warships, dark but not evil Peter Griffin, plastic guns, santaclause , hewvyjanded shipping, Apollo Justice, emotioanl truama from DDLC (this was written in 2019.),and sasquaches brutal death. AND DOCTOR CHIEMRA!
Crossover - Little Red Riding Hood & Undertale - Rated: T - English - Humor/Parody - Chapters: 12 - Words: 12,049 - Reviews: 1 - Updated: 9/25 - Published: 7/5 - Sans
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: 8 - Words: 57,526 - Reviews: 4 - Favs: 25 - Follows: 21 - Updated: 9/23 - Published: 7/16/2021 - Papyrus, Sans, Cuphead, Mugman
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: 7 - Words: 36,244 - Favs: 4 - Follows: 5 - Updated: 9/22 - Published: 6/30 - Dragonborn/Dovahkiin, Delphine, Frisk, Chara
A Rabbit In The Underground by SbOcean reviews
The Underground had seen an incalculable number of resets. Frisk, Sans and Flowey are tired of each reset, but in one reset, two new people fall into the Underground. Will these two break the cycle or will they become a part of it?
Crossover - Five Nights at Freddy´s & Undertale - Rated: T - English - Horror/Family - Chapters: 9 - Words: 13,261 - Reviews: 8 - Favs: 20 - Follows: 24 - Updated: 9/22 - Published: 5/19 - Vanny/Reluctant Follower, Gregory, Frisk, Sans
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: 13 - Words: 26,847 - Reviews: 20 - Favs: 97 - Follows: 121 - Updated: 9/22 - Published: 5/7/2021 - [H. Issei, Ravel P.] Yubelluna, Orange Soul
DoubleTale: When Devils Cry by lmao-imdeadaf reviews
21 iterations of W.D Gaster each brought a child with unlimited potential through from our world to theirs. These are the ones we know of. Somewhere, not too far from The Angel's own 'verse, another child is brought in, along with a few other…things. (Or, I'm a nerd so I inserted myself into a DT fic with DMC crap.) / ON HIATUS DUE TO PERSONAL SHIT - WILL CONTINUE AS SOON AS ABLE
Crossover - Undertale & Devil May Cry - Rated: T - English - Humor/Fantasy - Chapters: 5 - Words: 8,670 - Reviews: 1 - Favs: 2 - Follows: 3 - Updated: 9/20 - Published: 1/16 - Frisk, OC, Sans, Chara
The Eight-Legged Bootlegger! by MULTUS reviews
Muffet D. Baker, a Spider-Girl in a world where there are pirates, ability-giving fruits, government oppression, and infinite islands must strive and try her hardest to claim the title Queen of The Pirates by finding the treasure that W. D. Gaster left! Collecting crewmates on her voyages, she will make sure that her extinct race may someday flourish. That is her wish as a pirate!
Crossover - One Piece & Undertale - Rated: M - English - Adventure/Fantasy - Chapters: 67 - Words: 369,558 - Reviews: 1 - Favs: 13 - Follows: 16 - Updated: 9/19 - Published: 2/8 - Frisk, Sans, Muffet, Gaster
MoniTale by Joker the prince of all crime reviews
"This was never meant to happen, you should have just brought them back." Player said as he went to delete her , but then something caught his eye. The Monika lover smiled as he looked at the Heart. "Maybe you can still learn." He moved her file over to UNDERTALE and opened it's files. He was finding a spot to put her, hovering over Frisk's. Then the lightning struck them..
Crossover - Undertale & Doki Doki Literature Club - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 22 - Words: 87,315 - Reviews: 151 - Favs: 206 - Follows: 260 - Updated: 9/15 - Published: 2/21/2018
Digitale by Razorwolfie
A crossover fanfiction of Digimon and Undertale, I have been thinking about this for a long time, so I decided to make this fanfic. This also happens to be my first fanfic so it's probably not that good, but I hope you enjoy it regarless.
Crossover - Digimon & Undertale - Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 9,824 - Published: 9/3 - [Lunamon, Shoutmon] Toriel, Flowey
Corpse And Decay by Anime0CC0Manga
The Minus Among Minuses And The Cute Loveless Has Taken Quite The Fall Underground (I Own Nothing)
Crossover - Medaka Box/めだかボックス & Undertale - Rated: K - English - Adventure/Fantasy - Chapters: 1 - Words: 1,124 - Favs: 4 - Follows: 3 - Published: 9/2 - M. Kumagawa, Mukae E., Papyrus, Sans
Sonic in Undertale by Archaeopteryx108
(This is a work in progress. I own nothing. Sonic is owned by SEGA, and Undertale is a product of Toby Fox.) When a blue hedgehog that can go faster than the speed of sound and a small child fall into a mountain… they will find something quite unexpected… This is a version of the Pacifist Route with Sonic in it. I will upload infrequently. Review if you enjoy!
Crossover - Sonic the Hedgehog & Undertale - Rated: K+ - English - Adventure/Friendship - Chapters: 4 - Words: 3,605 - Favs: 4 - Follows: 3 - Updated: 9/1 - Published: 6/17 - Sonic, Frisk, Chara
Hazbintale by TheShade18 reviews
Who knew dying could offer new possibilities to monsters? Or more like a second chance like humans have? Now, it sounds cool if only it wasn't for the fact that I have been transported to Hell... as a Human itself. And why is this other smiler so interested in me? Oh well, at least it's a beautiful day outside.
Crossover - Undertale & Hazbin Hotel - Rated: M - English - Adventure - Chapters: 3 - Words: 10,608 - Reviews: 31 - Favs: 81 - Follows: 103 - Updated: 8/31 - Published: 5/7 - Sans, Alastor, Charlie, Blitzo
TALE, told True by Razaraga
A Nation, left with it's King dead. A Village, with a pariah about to be tried. A Child, desperate for love. And a Queen, longing for children. I wonder... what do these have in common?
Crossover - X-overs & Undertale - Rated: M - English - Chapters: 2 - Words: 1,816 - Favs: 1 - Follows: 1 - Updated: 8/30 - Published: 7/3 - OC, Toriel
The Evil of Principal Willaby by callofdutyFTWnintendoFTL
The horror of Principal Willaby is truly horrifying.
Crossover - Jimmy Neutron & Undertale - Rated: M - English - Horror/Angst - Chapters: 1 - Words: 1,058 - Published: 8/28 - Principal Willoughby, Asriel, Toriel, Asgore D. - Complete
Sinstale by Pikachu the critic
Taking under a nickname, you explore the underground where the demons were sealed. Will you make peace with them or make them face true wrath? The choice is yours.
Crossover - Seven Deadly Sins/七つの大罪 & Undertale - Rated: T - English - Adventure/Supernatural - Chapters: 2 - Words: 2,349 - Updated: 8/28 - Published: 8/24
Unwavering Will in the Sea by dafid1 reviews
What if Frisk from Undertale went to the world of One Piece? See what happens as Frisk goes on a new adventure!
Crossover - One Piece & Undertale - Rated: K+ - English - Adventure/Friendship - Chapters: 59 - Words: 87,986 - Reviews: 42 - Favs: 166 - Follows: 169 - Updated: 8/28 - Published: 11/28/2020 - Luffy, Frisk
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: 3,780 - Reviews: 1 - Favs: 2 - Follows: 2 - 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: 19 - Follows: 22 - 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
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: 61 - Follows: 71 - 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: 2 - Published: 7/27 - Death, M. Librarian, Richter B., Asriel
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: 326 - Follows: 384 - Updated: 7/24 - Published: 4/7/2016 - Harry P., Toriel
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