Adventure Time with Finn and Jake and Undertale Crossovers
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UNDERTIME by Matt3265 reviews
Two worlds. Two paths never meant to be. Though, with one simple wish, will their DETERMINATION conquer all? What do you two think?
Rated: T - English - Adventure/Humor - Chapters: 1 - Words: 5,709 - Reviews: 1 - Favs: 4 - Follows: 5 - Published: 11/21/2021 - Finn, Jake, BMO, Sans
Egress from the Underground by Spoopysis reviews
Exploring the Hall of Egress leads Finn to fall down into the Underground, where he meets another Human named Frisk
Rated: K+ - English - Adventure/Friendship - Chapters: 3 - Words: 4,158 - Reviews: 13 - Favs: 22 - Follows: 22 - Updated: 11/28/2018 - Published: 11/7/2018 - Finn, Frisk, Flowey, Sans
Hunting Chara by Jaykingamez reviews
A human girl enters OOO, no one who she is. But she is a born murderer, and her plans are to kill everything in OOO. Can our heroes stop her massacre? Cover is done by bostonbunny and here is the link: /art/Finn-x-Undertale-581390542 Note: Main characters of Adventure Time will die, so expect that.
Rated: T - English - Crime/Adventure - Chapters: 7 - Words: 14,519 - Reviews: 7 - Favs: 7 - Follows: 11 - Updated: 5/9/2017 - Published: 1/7/2017 - Finn, Jake, Sans, Chara
It Changes by Galliar reviews
A thousand years is a long time. A child emerges from the Underground a millennia after they fall in, and finds that they don't know where they are. This child is found by two adventurers, who hope to keep them safe in this world. What kind of world have they found themselves in? What's new? What's gone? Whatever happens they live on, too determined to let it stop them. *Cya later*
Rated: T - English - Adventure - Chapters: 2 - Words: 14,105 - Reviews: 4 - Favs: 37 - Follows: 34 - Updated: 6/6/2016 - Published: 5/27/2016 - Finn, Jake, Frisk