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Deltarune Crossovers
5 Reconnecting » by EquinoxWolf Kris has not seen his human sisters since he was a small child. When they seek him out to reconnect, Kris asks for a friend's help to give him strength. As a broken family pieces themselves together, they realise that their lives are more fragmented than they first thought. (Rated T for course language and mature references.)
Deltarune & Undertale, T, English, Family & Drama, chapters: 12, words: 22k+, favs: 10, follows: 11, updated: 16h published: 6/21, [Kris Dreemurr, Susie] Frisk, Chara
de underverse by Sans guardian después que un niño es akumatizado y liberado por Ladybug se convierte en superhéroe y se queda atrapado en la batalla contra X gaster unetele junto los iluminados y algunos compañeros para salvar a todos los multiversos
Deltarune & Miraculous: Tales of Ladybug & Cat Noir, T, Spanish, Adventure & Fantasy, words: 6k+, 8/8
MonsterKids (undertaledeltarune crossover) by bob2978910 a story where the two monster kids meet due to a glitch and must figure out how to fix things... with help from the fun gang.
Undertale & Deltarune, T, English, Humor & Adventure, words: 203, 7/30, Monster Kid, Kris Dreemurr, Ralsei, Susie
4 The Void Duet » by A Brazilian that hates footab Asriel was turning in to dust, and out of fear he jumped in the core, meeting the same fate as Gaster. Now they have to figure out a way back before Asriel gets forgotten by the world.
Undertale & Deltarune, T, English, Adventure & Humor, chapters: 11, words: 8k+, favs: 2, follows: 1, updated: 7/20 published: 5/28, Asriel, Gaster, Sans, Jevil
10 Fallen (deltarune-undertale) » by DragonChip Kris and susie travel to mt. Ebott and fall into the undertale timeline/universe
Deltarune & Undertale, K, English, Friendship, chapters: 11, words: 7k+, favs: 24, follows: 26, updated: 7/20 published: 2/7/2019, Alphys, Kris Dreemurr, Susie, Toriel
1 All was Well » by Anderius Watcher We are the fallen children of the degenerate world. We live and lie awaiting the day we can see again the cerulean sky. But until then, we shall keep our underground world from falling like the one on the surface has. My name is Frisk Morsvit, I am 16 years old, and I will be your eyes for this tale. DeltaRune/Undertale Crossover! AU! Nudism! FriskxAsriel!
Undertale & Deltarune, T, English, Adventure & Fantasy, chapters: 3, words: 11k+, favs: 9, follows: 12, updated: 7/8 published: 5/26/2018, [Frisk, Asriel] Chara, Kris Dreemurr
2 SOULRune » by Tenryu no hoko Kris is tired of the little game we've been playing. Now all the games are broken, and the worlds have reached their ends. With Heart and Mind at war, a spark of Determination spells salvation and peril on the lives of all, human, monster, lightner, and darkner alike. There's mischief, mischief, chaos, chaos afoot, and it's only getting dark, darker, yet darker.
Undertale & Deltarune, T, English, Supernatural & Adventure, chapters: 3, words: 4k+, favs: 8, follows: 7, updated: 6/30 published: 11/16/2019, Frisk, Chara, Kris Dreemurr, Susie
2 Undertale Vs Deltarune » by ShootingStarStories2 Based on the animation by Asriel Dreemurr. When three strangers come to their world, in seeking what they said, to kill a certain skeleton, They will have to Fight, Frisk, Chara, and Asriel to get through first. Who will win in this battle of the universe? This will be very interesting... Rated T Mild swearing is inbound.
Undertale & Deltarune, T, English, Hurt/Comfort & Suspense, chapters: 5, words: 5k+, favs: 2, follows: 3, updated: 6/5 published: 4/23, Frisk, Asriel, Ralsei, Susie
9 Triple Chaos (Crossover of Deltarune, Super Paper Mario and Kirby) » by InsanityLee When the balance of the timelines of Undertale finally give in to the Resets, new worlds come to unite with Deltarune. But when Jevil accidentally recreates the Chaos Heart which rebirths Dimentio and Marx gets sucked into his own black hole, things get seriously out of control. It is up to the Kris, Mario and Kirby to stop the ensuring chaos predicted by the Dark Prognosticus.
Mario & Deltarune, K+, English, Fantasy & Adventure, chapters: 5, words: 6k+, favs: 13, follows: 16, updated: 4/17 published: 7/27/2019, Mario, Dimentio, Jevil, Kris Dreemurr
Dungeons and Darkners: a crossover fic of three Frisks » by HowManyJays Three Frisks from different universes find themselves in a strange room that defies all logic and reason with no memories of how they got there and why. Logically, they decide it's best to play an RPG, which takes on a familiar turn. Frisk Bergman(Emmet) belongs to Killb94 on DA Frisk Kikiyama(Bambi) belongs to Katelynntheg on DA and Tumblr Older Frisk(Francisca) belongs to me.
Undertale & Deltarune, T, English, Humor & Friendship, chapters: 3, words: 14k+, follows: 1, updated: 3/20 published: 10/26/2019, Frisk
3 Underune two worlds meeting » by Napstegirl A Deltarune and Undertale story, Kris, Susie, Ralsei and Lancer has been sucked into the Undertale world, but things starting to get bad as something unknown is coming.
Undertale & Deltarune, K+, English, Adventure & Fantasy, chapters: 5, words: 11k+, favs: 11, follows: 11, updated: 11/12/2019 published: 3/21/2019, Kris Dreemurr, Lancer, Susie, Ralsei
The Crystal Hunters Episode 1: The Awakening by wacky-witch2455 A terrible event is just about to recur after the light crystal has been destroyed by an intruder in the Distortion world. The only hope in the world is just a young witch and her hoopa, who were in the wrong place at the wrong time
Deltarune & Pokémon, K, English, Fantasy & Humor, words: 1k+, updated: 10/31/2019 published: 10/10/2019
TrioTale » by Felicity The Pirate Many years ago, the king's youngest son, Asriel, found a fallen human by the name of Chara. Ralsei is the eldest Dreemur, next in line for the throne but with the arrival of a second human by the name of Frisk, the future of all the monsters rests in the hands of the two humans that now roam the underground. Chara is determined to protect their family and keep them safe.
Undertale & Deltarune, K+, English, Hurt/Comfort, chapters: 3, words: 4k+, favs: 2, follows: 1, updated: 10/23/2019 published: 10/22/2019, Frisk, Asriel, Chara, Ralsei
1 Felicity and the Legend of Deltarune » by PerkyGoth14 Felicity seems to be having trouble in Auradon Prep lately. Not that anyone is bullying her or her friends don't trust her anymore, but she feels bored. Eventually, a story writing assignment in class turns into a new adventure when her friend Carlos finds a book called "Deltarune" which sounds familiar in a family sense like her mother's adventure in Undertale.
Descendants, 2015 & Deltarune, K+, English, Adventure & Fantasy, chapters: 5, words: 16k+, favs: 3, follows: 2, updated: 10/14/2019 published: 9/9/2019, Carlos, OC, Kris Dreemurr, Susie
1 The EvoAlpha Series by Patrick200207 I'm returning to story making because of the inspiration to John Brain, the youtuber who made Russian Animated Videos based of games. I wanted to make my own version of these kinds of stories as fanfictions. So this is my first Deltarune Crossover, And it's a series. This is a work in-progress series because there will be more soon, And if you ask? Christine is a Kris AU.
Soul Calibur & Deltarune, K, English, Adventure & Humor, words: 3k+, 10/13/2019, Pyrrha, Kris Dreemurr
96 Inkopolis Chaos » by JRedd7272 When Kris, Susie, and Ralsei get teleported to Inkopolis by Switch, they must get the help of Redd and his friends to help them get home. But Jevil has also come to spread some chaos. Will they get home, or will they be stuck in the immense chaos that awaits them? (Takes place the same time as Tartar's Return)
Splatoon & Deltarune, T, English, Adventure & Friendship, chapters: 20, words: 48k+, favs: 10, follows: 10, updated: 10/11/2019 published: 12/3/2018, Octarians, OC, Jevil, Susie
Kris’s Dream by MsAnn My first and sadly only Undertale/Deltarune story since I am moving onto Wattpad for the rest of my ideas. (Aka my last story idea on here.) Hope you enjoy anyways.
Deltarune & Undertale, K+, English, Suspense, words: 362, favs: 2, follows: 1, 9/26/2019, Kris Dreemurr, Chara
A very Dunk Papyurs and an a very tiered Unyne by Wonderdogcrater A reboot of a fanfic I made for somone on Tumbler. By the way thanks to the reviwers that reviwed this. (One-shot)
Deltarune & Undertale, K, English, Humor & Friendship, words: 120, 8/27/2019, [Undyne, Papyrus]
68 Inkopolis Depression » by JRedd7272 Redd got reminded of a bad memory of his loved ones, and he became depressed. Marie wants to do whatever she can to try and help her boyfriend. And the Fun Gang decides to chip in and help out. But what happens when a certain foe comes back for more, to try and ruin the couple's lives forever? (AU for Depressink, sequel to Inkopolis Chaos)
Splatoon & Deltarune, T, English, Adventure & Romance, chapters: 7, words: 24k+, favs: 3, follows: 3, updated: 8/12/2019 published: 5/6/2019, [OC, Marie] Kris Dreemurr, Susie
Deltapearls » by anjeez929 Mermaid Melody with Deltarune characters! Instead of Humans and Mermaids, it's Greyners and Lightners. Darkners replace Panthalassa. Encounters are Deltarune battles but singing increases the attack power
Mermaid Melody Pichi Pichi Pitch & Deltarune, K, English, chapters: 2, words: 3k+, updated: 8/1/2019 published: 7/4/2019
9 UnderRune » by Bulbasaur the Bulbasaur Kris and Susie fall in a hole and they are in undertale now
Undertale & Deltarune, K+, English, Humor & Parody, chapters: 4, words: 1k+, favs: 1, follows: 1, updated: 7/25/2019 published: 3/12/2019, Frisk, Kris Dreemurr, Susie
6 When Worlds Collide » by SafetyNerd It has been a couple years since the monsters reached the surface. Inter-species relations are decent, and everyone is happy. That is, until one day, when an unfamiliar door appears in the Dreemurr home. A gateway bridging two worlds that never should have touched. What happens when Frisk decides to enter the door?
Undertale & Deltarune, T, English, Adventure & Fantasy, chapters: 7, words: 3k+, favs: 28, follows: 35, updated: 7/15/2019 published: 12/3/2018
4 Words » by nirimiri Chara helps their siblings.
Deltarune & Undertale, K, English, Family & Hurt/Comfort, chapters: 4, words: 4k+, favs: 18, follows: 17, updated: 5/7/2019 published: 11/26/2018, Chara, Frisk, Kris Dreemurr
11 Stranded (A Deltarune Fanfic) » by Greg Jonson Kris is alone. And to make things even worse, as he struggles to find friendship and understanding with the people around him, something odd begins to happen inside his head. Which voice will he listen to? / This work of fiction aims to connect the worlds of Undertale and Deltarune. Rated T for the topic of depression and other mental issues. / This story will remain unfinished.
Undertale & Deltarune, T, English, Friendship & Mystery, chapters: 4, words: 9k+, favs: 10, follows: 11, updated: 5/7/2019 published: 1/18/2019, Sans, Kris Dreemurr, Susie
4 Ingrate by SaintHeartwing Kris has had enough of being controlled. Now the SOUL that's been making use of him is going to learn what it feels like to be powerless. Or so he thought. Because the SOUL has something to say. It's going to speak its mind, and Kris is going to listen.
Undertale & Deltarune, T, English, Drama, words: 2k+, favs: 22, follows: 9, 4/27/2019, Frisk, Kris Dreemurr
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