One Piece and Undertale
Crossovers
122
Unwavering Will in the Sea » by dafid1
What if Frisk from Undertale went to the world of One Piece? See what happens as Frisk goes on a new adventure!K+, English, Adventure & Friendship, chapters: 92, words: 166k+, favs: 323, follows: 341, updated: 9/26/2024 published: 11/28/2020, Luffy, Frisk
1 Overseer » by Soriel Riot
Error, the former god of destruction got himself an interesting friendship. He's friends with the pirates that has chaotic tendencies. I do not own One Piece nor Undertale. Be mindful that Error is different from the OG FGOD Error. He has friends.T, English, Adventure & Friendship, chapters: 4, words: 5k+, favs: 27, follows: 26, updated: 3/12/2023 published: 1/12/2023
15 PirateTale (Rewritten!) » by lizard-senpai
(This is a revamped version of PirateTale!) After centuries of resetting, over and over, Chara gives into Frisk, letting her RESET the world one last time, an act that erases them from the Undertale timeline.T, English, Family & Adventure, chapters: 3, words: 4k+, favs: 55, follows: 65, updated: 6/6/2019 published: 11/19/2017
38 PirateTale » by lizard-senpai
After centuries of resetting, over and over, Chara gives into Frisk, letting her reset the world one last time, an act that erases them from the Undertale timeline. After a promise is made and both girls spend fifty never-changing years in the void, they find themselves in a strange new adventure. One with Pirate Kings, talking skeletons, and mending souls.T, English, Family & Adventure, chapters: 17, words: 18k+, favs: 91, follows: 88, updated: 6/6/2019 published: 1/5/2017
86 Magical Bonds » by KingKUN
A Undertale, One Piece mix up! Axel was experimented on and somehow ended up with Sans' power! Not just that, he also has Sans' soul stuck with him through the adventure! Now what would happen if he joined the Strawhats? Madness! That's what! (SOMEWHAT SELF-INSERT)(discontinued)T, English, Adventure & Humor, chapters: 24, words: 106k+, favs: 176, follows: 181, updated: 11/21/2018 published: 8/6/2016, Strawhat Pirates, OC, Sans, Chara
15 Brook meets sans » by Our hero
When the straw hats go to a mountain to recuperate from being chased by the marines, and accidentally fell into the cave, Brook wakes up alone, can our lone hero find his friends. Was I the first to think of this?. abandoned.T, English, Humor & Adventure, chapters: 11, words: 32k+, favs: 42, follows: 39, updated: 5/23/2018 published: 5/22/2017, Brook, Sans
1 The Reluctant » by Melanora
They never expected to be here, of all places, and they're definitely not ready to be here yet...so what else can they do but move forward? (...Well if you don't wanna die of annoyance, well..try not to read this. Just kidding. I hope somebody want's to adopt this or something. If you do pm me.)T, English, Hurt/Comfort & Family, chapters: 2, words: 1k+, favs: 4, follows: 1, updated: 9/27/2017 published: 9/25/2017, Chara
6 Blue Feathers, Yellow Flowers by catscats1223
Yellow flowers, they were every where. The stone had a purple hue to it. Marco was alone, but he felt something in the darkness.K, English, Mystery & Parody, words: 804, favs: 17, follows: 19, 11/12/2016, Marco, Whitebeard Pirates
3 begin again » by Niilo's
Thousands of years later, history describes him as the legend that freed and brought peace.T, English, Adventure & Hurt/Comfort, chapters: 3, words: 9k+, favs: 7, follows: 5, updated: 2/9/2016 published: 2/2/2016, [Luffy, T. Law] Nami, Papyrus