Captain Underground

Captain Underground

TheDepressedSans

Reads 1,032
Votes 16
Parts 6

MatureOngoing49m

Last published Mon, May 27, 2019

amnesia captainunderpants chara crossover flowey

a crossover of Captain Underpants and Undertale. you can kinda guess what's gonna happen to the boys and CU/Krupp :3 NOT A GxH STORY

All Rights Reserved

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Its Just A Reset (An Undertale Fanfiction) DISCONTINUED
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Player (Y/n) Play a game name undertale he did neutral and good endings and now his doing the genocide run, Killing all the monsters but then There was a glitch Frisk have the mind of they own and try to press reset but the player refused but it all ended up resetting and Player got sucked in the game
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Across the Timelines [an Undertale Fanfiction]
(ORIGINAL Version. Not revised) No one ever expected for the timelines to cross, that is, until there were two of them. The lovable and friendly Frisk, and the evil killer, Chara. With an experiment gone wrong, and a strong connection between the two boys, can Frisk and his friends change Chara's view of monsters?
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Eternal Bloodied Petals
The timeline has been glitched due to the many resets Frisk has done. Causing the storyline and characters to be affected by the glitches. Papyrus has been affected by the glitch and has turned yandere (maybe? I don't know...yet... I'll add a better description later) I am currently editing some of the old chapters, for I have seen some... mistakes.
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Scars: Female Chara X Male Reader
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~Why do you care~ [Underfell Sans X Reader] [•COMPLETED•]
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A pink puffball in the underground (Kirby X Undertale)
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The First Human [X Sans] {COMPLETE}
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]
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Saving Them (an Undertale fanfiction)
The barrier is broken, monsters and humans are living in peace, everyone is happy except for one person. Frisk has been getting waking nightmares about not saving Asriel. They want to save him to erase all guilt and to be with their friend. But Asriel isn't the only one that needs to be saved. Something, someone lurks inside Frisk's soul. Someone deadly and has a hunger for power, and can kill anyone they want. A/N Frisk and Chara are both gender ambiguous in this story. Also there will be a little bit of Frisk x Asriel in this story, but this is not a Frisk x Asriel fanfiction. Credit to @karinacat59 for the cover. Undertale belongs to Toby Fox and none of the characters are mine.
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Determined to Stand
After 3 years after Frisk flee the monsters from the Underground. She lives happily up on the surface with her new family of monsters. Well with Toriel, Asgore, Undyne, Alphys, and Flowey left to Washington D.C to meet the president. Sans and Papyrus are left to watch Frisk till Toriel returns home. Chara has plans to take control of Frisk. He wants her soul and to Reset the world again. There is however another person whom lurks beneath the shadows that Sans and Papyrus kept secret from Frisk. Now it's all going to be reveal. So many mystery to solve and secrets to uncrack. Frisk will soon have to face her fears and overcome Chara's evil plans. With the help of old and new friends. Note: Frisk is a female in the story and Chara is a male.
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Red Eyes [Chara X Reader]
This story is inspired by many other works and may bear some resemblance in certain places. However, I will endeavor to make this story it's own. 2 years ago monsters were released from the underground, ending their centuries-long imprisonment at the hands of ancient humans. Not a soul remains in the underground. But that doesn't mean no one's there. Be it chance or fate, The First Fallen will soon meet an all too curious human as he ventures into the deep beneath. The Reader or [Y/n] is male and Chara is female. I apologize if this bothers you it's just how I've always seen the character. Disclaimer: I don't own these Chara-cters nor do I own Undertale. This is just for fun. This story's rating is [M] for explicit language, violence, suggestive or sexual themes, and fantasy/fictional violence. My lovely reader @NightTheDemon1 told me that the artist of the cover is a Twitter user known as @A___IRAA. Thank you!
UnderAsriel
Chara has one objective: RESET back to when they themself fell, and save Asriel from his demise. With all the Genocide Runs the now-free Frisk goes on for them, they're able to amass a big enough collection of SOULs to do exactly that. The only problem is, Asriel remembers everything that happened when he was Flowey. And he isn't too happy about it... In this new timeline, Kelsa, the SOUL of Bravery, falls into the Underground shortly after Frisk. Determined to save her only friend, Kel teams up with a mysterious flower with a face to find them and rescue them from Asriel's notorious freezing chambers. Betrayed by many, and uncertain who to trust, Kel finds herself in the midst of an iron-fist dictatorship, fighting to restore the Underground to the peaceful place it used to be. But... all is not as it seems, and there may be things about Frisk that Kel will wish she'd never discovered... Cover art by yours truly :3 This story takes place after the events of Underhappened. You may wish to read that first if you haven't already :D
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the proxy and the princess (female chara x male proxy reader)
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ships sans X frisk papyrus x Mettaton Undyne x Alphys Toriel x Asgore Asriel x Chara you can also ask Flowey, Nastablook, Temmie And myself if you want
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Daybreak [ Error!Sans x Reader ]
Gone. In a single moment, in the blink of an eye, everything you have ever known or cared for is eradicated. Hopes and dreams, traditions and stories that date back centuries have been erased without thought or care. Nothing matters and no one will ever live again to pass on the memories and stories of what was lost. Except you. You are the anomaly, the glitch that survived when all else could not. When your universe was destroyed, you found yourself stranded, alone, afraid in a white world without end. But there's little time to rest when you discover that your universe was merely a grain of sand on a much bigger ocean. Whole other worlds thrive in different plains of existence, and they're all going to war. In a desperate power-struggle for the upper hand, you find yourself an unlikely ally. The future seems certain, chaos will win and the universe will be plunged forever into violence and bloodshed. And it will take a lot more than a miracle to win.
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Something Hidden Female chara x male reader
• I reccomend you do not read this, this is my worst work yet despite it being my first. There is another story on my profile that is under development and editing. Other than that everything else here has remained untouched for over two years. DISCLAIMER: i do not own undertale nor any videos, pictures, intro, etc. And i reccomend checking out the original creators You are an ordinary teen or are you with a weird crystal appearing right next to your bed with it telling you strange things and having an encounter with a flower saying you soul is special are you really normal and is the senior year of high school really be normal with monsters starting to teach and attend school will your life really be normal?
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What Went Wrong?
~'Disclaimer: This story has a lot of profanity and covers some very very intense or touchy subjects that may disturb some readers. You have been warned.'~ ((Unedited)) After Chara fell into the Underground, they met Asriel a monster inhabitant of the Underground. Soon after that, Chara joins a new family, but their ambition to keep everyone happy goes a little overboard and Chara is flung into a reality of destruction and hopeless wonder. Then many long years later they meet the beloved Frisk, who fell into the Underground, similar to themselves. Eventually everything Chara thought they knew correctly is turned upside down and they as a person are changed forever. ~'The game Undertale belongs to Toby Fox and some of the dialogue is ripped straight from the game itself, too.'~
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Its Just A Reset (An Undertale Fanfiction) DISCONTINUED

Frisk and Chara start off battling Sans but Frisk rebels against Chara and resets. But the next reset is strange. (Mentions bullying, self harm and depression) (very weird and goes way off plot sooo....) (The cringe is real)

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