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The Alien Hero of the Underground (Ben 10 X Undertale)

Reads 18,425
Votes 378
Parts 22
Time 7h 27m

Reads 18,425
Votes 378
Parts 22
Time 7h 27m

asgore asriel ben10 ben10xundertale crossover flowey frisk omnitrix papyrus sans toriel undertale undyne

This story follows the storyline of if Ben 10 travelled the Underground with Frisk.

Feel free to notify me of any errors in the story.

I hope you enjoy.

(I do not take credit for any artwork I use throughout the story.)

(Undertale and Ben 10 both belong to their respective creators.)All Rights Reserved

asgore asriel ben10 ben10xundertale crossover flowey frisk omnitrix papyrus sans toriel undertale undyne

22 parts

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What We Hope For (Sans X Reader) ✨UNDER EDITING✨ by Grace97721

Everyone has a happy ending. If you're not happy it's not the end . . . . •°•°☆°•°• Y/n (that being you) fell into the underground at the age of 13 and found refuge inside a hidden house in the snowy forest. Fast forward 10 years later still no one knew of her existence. That all changed within the span of a year. First there was a punny skeleton, then a child with a striped sweater, then chaos. Memories of the past resurface, A romance blossoms, Drama rises, Follow y/n as she learns again what friendship, trust, fun and love is. I HOPE you're up for it. •°•°☆°•°• [Warning the story is rated for older teens as it will have: - mild profanity - creepy descriptions - violence (ranging from mild to slightly graphic) - blood - murder - trauma - genocide - suicide (only in one chapter)] _______________________________________ Specials/Extra content: ⤵️ 🎃 Part 1: Available 🎃 Part 2: Available 🎄: Available 🍳 : Available 🔪 : Available Q&A : Available 🎃 Rewrite : coming soon _____________________________ Highest rankings: #2 xreader #1 Undertale #1 Sansxreader #1 Sansxfemalereader #1 Frisk #1 Determination #1 Asgore #1 Alphys #1 Toriel #2 Papyrus #2 Flowey #2 Undyne #2 sans ______________________________________ Credit to artists for cover and any chapter artwork. All characters except for the ones I create belong to Toby Fox, creator of Undertale.

A Soul of Power by FabuJim777

When a human named Jim falls down a dark hole and enters the underground, he notices that he suddenly gains a rare power, strangers tell him that they once knew him and many other strange things occur. Once he enters the gray door, nothing is the same anymore... ⚠️ Slight profanity and potty humor ⚠️ Told in 3rd person (aside from a few select POV's). Disclaimer-- I do not own Undertale. Undertale belongs to Toby Fox, as do all of the characters except for the new characters that I created.

Scars (Alphyne Fan-Fic) (Completed) by undertalekate16

None of the fan art in this book is mine all of them are credited to the artiest. What if Undyne and Alphys never met until Frisk saved the monsters and brought them to the surface. They have only met once and that's when Undyne was sent on a errand by King Asgore to give Alphys some letter from the king himself. Now that they are on the surface they all go to the same collage. Undyne and Alphys officially meet when Undyne goes to the bathroom and see three human girls hitting and attacking Alphys. Undyne and Alphys gets closer to one another and become a couple, but there is one problem Undyne's ex-girlfriend Lydia wants to control everyone and take over. There will be pain, love, abuse, losses and Determination. Also you'll get to see you two of my own character Lyida(who is Undyne's Ex- Girlfriend) and Allison who is in later on in the story. There is more to the story other then the secrets of Alphys and Undyne.

To SAVE a Demon by jhbloodstorm

Frisk has gone through the Underground countless times. Each time trying to figure out a way to SAVE the one that started everything. But this time it will be different, there is only one thing that hasn't been tried until now. (Disclaimer: I have never written a fanfic before, so don't expect a masterpiece) (Disclaimer 2.0: This will have MAJOR spoilers from the game (obviously) so I highly recommend you play the game first)

Out of Reach. An Undertale fanfiction by Tyanfan13

A Sans x Frisk fanfic. What if after Asgore's abrupt death, Frisk didn't leave the underground? What if they were forced to stay? And more importantly, what would happen next? Title picture is by Echoo on Pinterest In this story Frisk hasn't befriended Undyne. Undertale and all its characters belong to Toby Fox.

Another Tale by Indian024

what if Asgore and Toriel part on good terms after his delcaration of war? what if Flowey did not turn evil by the time Frisk came into the underground ? what if Papyrus was more willing to fight and more able to dodge (..without still knowing what capturing a human would do)? what if Sans still did not find about "the anomoly" due to Flowey's lesser amounts of resets? and more small things a "what if" type of story for all to see

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What if our favorite Undertale characters were in the world of Among Us? Read along as the imposter, Frisk, tries to sabotage and kill everyone. Each area of the ship represents an area in the underground and nine of our favorite characters (plus added ghosts) will have to finish their tasks and root out any imposters in their midst. Will sans finally stop being a lazybones and finish his tasks? Will Undyne stop the imposter in their tracks? Will Mettaton ever stop accusing monsters that he knows are innocent? Read along to find out!

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Imagine Undertale, but Chara never showed up. Chara wasn't the first human in the Underground. What if a glitch occurred, and you fell down instead? You fell into the Underground, but you cant remember your previous life. Now, you are surrounded by strange monsters, who have also never seen a human before. Will they let you live? [written 2017]

Undertale React by MysteriousPerson0193

Undertale is going to react. This will not be entirely canon and will include aspects of what I believe (backstories, ect.) I do not own the cover and I do not own any of the characters.

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Slide 1 of 10

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What We Hope For (Sans X Reader) ✨UNDER EDITING✨

Everyone has a happy ending. If you're not happy it's not the end . . . . •°•°☆°•°• Y/n (that being you) fell into the underground at the age of 13 and found refuge inside a hidden house in the snowy forest. Fast forward 10 years later still no one knew of her existence. That all changed within the span of a year. First there was a punny skeleton, then a child with a striped sweater, then chaos. Memories of the past resurface, A romance blossoms, Drama rises, Follow y/n as she learns again what friendship, trust, fun and love is. I HOPE you're up for it. •°•°☆°•°• [Warning the story is rated for older teens as it will have: - mild profanity - creepy descriptions - violence (ranging from mild to slightly graphic) - blood - murder - trauma - genocide - suicide (only in one chapter)] _________________________ Specials/Extra content: ⤵️ 🎃 Part 1: Available 🎃 Part 2: Available 🎄: Available 🍳 : Available 🔪 : Available Q&A : Available 🎃 Rewrite : coming soon _ Highest rankings: #2 xreader #1 Undertale #1 Sansxreader #1 Sansxfemalereader #1 Frisk #1 Determination #1 Asgore #1 Alphys #1 Toriel #2 Papyrus #2 Flowey #2 Undyne #2 sans ________________________ Credit to artists for cover and any chapter artwork. All characters except for the ones I create belong to Toby Fox, creator of Undertale.