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Pokémon and Undertale Crossovers
51 Underleague » by sen whitefox mako red demon 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
T, English, Adventure & Family, chapters: 42, words: 87k+, favs: 98, follows: 107, updated: 7/27 published: 9/11/2016, Frisk, Asriel, Papyrus, Sans
4 YellowTale » by YellowCaballeroFan Ever since Toby Fox made the RPG game know as Undertale 5 years ago, many people made their own versions of it, known as AUs, or Alternate Universes. Here is my AU, which stars a most likely forgotten character from the Pokemon Adventures Manga: Yellow. This is also kind of takes place after a whole bunch of stories that expand on Yellow's character. Hope you enjoy!
T, English, Adventure & Friendship, chapters: 28, words: 20k+, favs: 8, follows: 9, updated: 7/25 published: 11/9/2020, Yellow, Pikachu
Undermon by eway4 When Frisk, a trainer from Lumiose City, accidently climbs Mt. Ebbot, she meets up with a talking Gothorita named Chara who only she can understand, and they go through the Underground. Fem!Frisk Fem!Chara
K+, English, Adventure & Friendship, words: 602, 2/21, Gothorita, Frisk, Chara
4 It's Showtime » by TeamZacian What happens when Scarlett, the hot-headed Unova champion, challenges Mettaton, the Underground's MOST POPULAR celebrity, to a theater competition? With the Undertale cast on vacation in Alola (and all in the same guest house may I add), Frisk agrees to act as producer for the whole thing while roping Sans and Flowey into it as well. On the Pokemon side of things...*UNDER REVISION*
K+, English, Humor, chapters: 17, words: 22k+, favs: 6, follows: 6, updated: 2/19 published: 4/1/2020, Ash K./Satoshi, OC, Frisk, Flowey
4 Into The Underground » by EllieJoFlow A mysterious mountain appeared out of nowhere near Pallet Town. A strange girl fell in and so have Ash and Pikachu. The three heroes need to make their way though the underground to go back home and free the monsters. Will they end up out and alive with the monsters behind them? Or will nothing but dust be left behind? Find out in the story Into the Underground!
T, English, Adventure & Friendship, chapters: 2, words: 3k+, favs: 7, follows: 8, updated: 1/28 published: 1/25, Ash K./Satoshi, Pikachu, Frisk
Paths to Take by hopefulheart108 Frisk was always told to evolve ever since he was born, but the problem with that is he has too many options to choose from. Apparently, his problem is solved by stumbling into a hole. Eevee Frisk AU.
T, English, words: 340, favs: 4, follows: 7, 12/16/2020, Eevee/Eievui, Frisk, Sans, Flowey
114 Pokémon Mystery Dungeon: Down to the Bone (OLD) » by Bloxanoid THIS STORY IS GOING TO BE REWRITTEN! STAY TUNED FOR THE NEW STORY!
T, English, Adventure & Mystery, chapters: 15, words: 52k+, favs: 32, follows: 39, updated: 9/20/2020 published: 9/30/2018, Pikachu, Fennekin/Fokko, Papyrus, Sans
4 Dungeontale Explorers of Sky » by Silver-the-Cat21 An anmesiac human turned monster and a well-meaning coward happen to meet. Little do they know, their meeting happens to change the fate of the entire world. A crossover between Pokemon Mystery Dungeon and Undertale. I suck at summaries. Reviews are very appreciated. And enjoy!
K+, English, Adventure & Fantasy, chapters: 12, words: 32k+, favs: 10, follows: 10, updated: 5/18/2019 published: 2/21/2018, Frisk, Monster Kid
111 A Tale of Two Kids » by Oathkeeper0317 The first story confirmed by my What If story. Ash has arrived in the Underground, unable to leave due to the Barrier, he accompanies Frisk through the Underground, makes new friends, and a enemy. I own nothing. Non-Canon. Also, due to a story/continuation error. Check my profile for info on my AU Ash. Cover Image by Pikablu42
K+, English, Adventure & Friendship, chapters: 19, words: 29k+, favs: 87, follows: 102, updated: 3/3/2019 published: 4/21/2016, Ash K./Satoshi, Frisk, Chara, Gaster
2 alolatale by unkownassassin will Moon and her friends stop her mother from destroying alola?
K+, English, Romance & Tragedy, words: 70, favs: 1, follows: 1, 8/2/2018, Moon, Sun, Sans, Papyrus
1 Pokemon Adventures: UNDERTALE » by SparkdaPikachu1997 I honestly can't understand anything in my life anymore. I escape on adventure only to get sucked into another. Now, I'm trying to revert this whole problem, but that's almost impossible. I have too many questions! Who really is this 'Josh' person? Who is this... thing he's fighting? And when did W. D. Gaster get involved in this, anyways? -F (Rated T because of possible swearing.)
T, English, Adventure, chapters: 2, words: 1k+, favs: 5, follows: 5, 6/13/2018, Mewtwo, Shinx/Kolink, Frisk, Asriel
7 A whole new world by MaybeMuggleborn The monsters have left the surface with frisk however they have found themselves in kalos
K+, English, Humor & Friendship, words: 335, favs: 9, follows: 10, 2/14/2018
5 Poketale of the Chosen one » by Guillermo Riers There's a glitch in the program. The data is corrupted. The Underground isn't where it usually is. Out of nowhere, it made it's way to the world of pokemon. Ash and his pal Pikachu were in the forest looking at pokemon with his school friends when something lured him away and leading him to the Underground. (Rewrite in process)
K+, English, Humor & Adventure, chapters: 6, words: 5k+, favs: 11, follows: 17, updated: 11/22/2017 published: 6/5/2017, Ash K./Satoshi, Flowey, Frisk, Sans
10 Undermon » by Bayoboo A new trainer has come to Sinnoh. When Dawn faces him in a battle, a bond blooms. But will Dawn be able to face her friend's ugly truth? Rated T for violence.
T, English, Adventure & Friendship, chapters: 3, words: 765, favs: 13, follows: 18, updated: 11/14/2017 published: 11/10/2017, [Dawn/Hikari, Sans] Cubone/Karakara, Papyrus
6 Pokémon Mystery Dungeon: Three Explorers of Sky » by AilingStar An amnesiac human, an earnest coward, and a prince who's supposed to be dead meet on a beach. Together, they explore dungeons.
K+, English, Adventure, chapters: 2, words: 3k+, favs: 18, follows: 12, 11/1/2017, Shinx/Kolink, Vulpix/Rokon, Asriel
Pokespe x Undertale » by Pokey-Removed The first two chapter were past me... They're really bad XD. If you look at my old stories they're super happy and cringe and my writing style changed to gore and depressing. So I hope I'm still staying on track with humor... (Trying really hard to stay away, but might be OOC Also will think of a better title soon)
K+, English, Adventure, chapters: 4, words: 4k+, favs: 1, follows: 1, updated: 10/23/2017 published: 10/22/2017
15 Bone Bros » by SneaselXRiolu After a bad RESET, Papyrus and Sans are thrown into the world of Pokemon Mystery Dungeon: Explorers of Time. Now they must try to find their old friend Frisk and fix all of these mistakes. And what's the deal with the Incomplete Team? And Odett's Dimensional Screams? And Team Skull Being Boneheads?
K+, English, Humor & Adventure, chapters: 3, words: 2k+, favs: 36, follows: 40, updated: 7/3/2017 published: 12/18/2016
Goldie's Origin by Riolu Underwood This is Goldie's origin. He may seem nice at first, but things arn't always what they seem.
T, English, Hurt/Comfort & Adventure, words: 707, favs: 1, 6/22/2017
17 RangerTale » by Lynja Fairy Humans have used and exploited the powers of Pokémon, for good or for nefarious reasons. Far away, in another region, in another time, monsters could harness the power of the human soul. Join Ranger Frisk as she rediscovers the meaning of Friendship and rights a wrong that should of never happened.
T, English, Friendship & Family, chapters: 6, words: 19k+, favs: 14, follows: 17, updated: 6/18/2017 published: 9/11/2016
32 A BONE-a-fide Master » by StallionWolf Souls...something so strong yet fragile...Something that holds a person's identity and abilities...what would happen if fragments separated from the main one, and yet gained strength... Now follow Ash on an adventure... Overcoming obstacles with his cheerful attitude, bone skills, and...DETERMINATION
T, English, Adventure & Friendship, chapters: 5, words: 13k+, favs: 79, follows: 76, updated: 5/28/2017 published: 5/18/2017, Ash K./Satoshi, Marowak/Garagara, Papyrus, Gaster
The Journey PT 2 The War by Riolu Underwood This chapter is about the War.
T, English, Supernatural & Tragedy, words: 193, 5/6/2017
The Journey by Riolu Underwood As Riolu and Riku are having a "normal" day, little do they know they are being watched...
T, English, Sci-Fi & Friendship, words: 223, 5/5/2017
2 MysteryTale » by vibranthawk5 This is a crossover between Pokemon Mystery Dungeon and Undertale, inspired by the songs Kamex produces (I highly recommend you look him up), I just decided to hell with it and wrote a fanfic about it. Let me know if this is absolute garbage or not, its my first one.
T, English, chapters: 3, words: 4k+, favs: 4, follows: 5, updated: 2/21/2017 published: 12/29/2016
90 TrainerTale: Determination Red and Purity Blue » by SA-ramblings Frisk didn't expect to survive up in Snowbeak Mountains. Life was terrible. They just wanted to leave, leave where no one would find them. But they were saved and given the chance to start over in the Ebott region. Wait, wasn't that place a myth? (Readers vote 4 story-route! A/N has warnings. AU by Friisans on Tumblr! ! UPDATE: ETERNAL HAITUS, I'M SORRY !)
T, English, Adventure & Friendship, chapters: 15, words: 21k+, favs: 70, follows: 101, updated: 1/27/2017 published: 1/25/2016, Frisk, Asriel
The Story of Hatred (UnderTale-Pokemon mix) by dewhoa96 Disclaimers: 1.) If you don't like either one of these, leave. For your own good. 2.) This goes without saying, but...SPOILERS. 3.) This might not make much sense to the larger quantity of you viewers. Let's keep it that way. ( 4.) YES, I KNOW The soul of Hate as been used. So don't even start.
T, English, words: 177, favs: 1, 1/23/2017
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