After fighting in Chara's genocide run for what seemed like a lifetime now, Sans devised a new plan to get rid of the wraith, in the hopes of giving his brother a happier life. In doing so, there were unintentional side effects and Sans found himself in an entirely new world. Undertale—more specifically, Sans, meet the Marvel Cinematic Universe.

What if by some curious opportunity, instead of Wonderland... it was the Underground, the realm of monsters that Alice fell down the rabbit hole into? It's a world just as curious, with as many colorful characters, and things to discover... but is 'kill or be killed', 'mercy or violence', 'a good time or a bad time'. Can her curiosity and imagination open up into determination?

When Unspeakable Hermione Granger went to investigate a time-magic anomaly, her research sent her down a rabbit hole she never would have expected.

Deep below the earth with little memory and echoes of Blood coursing through her, the Good Hunter awakens in the Underground. "This doesn't look like a Chalice Dungeon."

Jaune Arc climbed a mountain outside his home village. He fell into the famed mountain. Now he needs to find a way out. But things are rarely easy, so he has to take on an odd gauntlet within Mount Ebott. Monsters aren't always Grimm, and not always bad either. All he can do now... is remained Determined.

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.

What if Frisk went to the world of Fairy Tail?

"This was never meant to happen, you should have just brought them back." Player said as he went to delete her , but then something caught his eye. The Monika lover smiled as he looked at the Heart. "Maybe you can still learn." He moved her file over to UNDERTALE and opened it's files. He was finding a spot to put her, hovering over Frisk's. Then the lightning struck them..

With the Monsters being released from the Underground by demand from the Wizarding World, Voldemort has gone on a killing spree vanquishing everyone in his path… except one. Her name was Frisk Dearborn and she was known to the public as the Girl Who Lived.

Frisk succeeded in freeing the Underground from the Barrier, and all is freed back to Tamriel... too much they see is wrecked with strife from the Thalmor, and now a Dragon Menace. Teamed up with Jin, a former Soldier of the Imperial Empire, and the fated Dragonborn, they all travel to stop the Dragon Meance, and the Thalmor in a unlikely alliance. (Pairings Undecided)

You are not a hero, yet here you are with a happy ending. Or, Rachel, and the aftermath with the monsters. Part of "you are more than a broken glass flower"

It's been over two years since Frisk fell to the Underground, and was adopted by the Dreemurr family. One of her former foster parents has finally noticed, and come looking for her. Now, if Frisk can't find a way to bring her families together... it might just tear her apart. Book Three of The Underground's Saviour

Isaac Clarke at first thought he was doomed. But with the Titan Station's shock-point generators malfunctioning, he is transported to a supposedly new world. But the threat of the markers are looming over, and soon Isaac will have to experience the horrors of the necromorphs once more. Maybe he will have some help... UPDATE: I'm back, and I've got stuff to say!

Sequel of "The Hope Reborn". Years after Illaster's defeat the Princeton Family seem to do unfinished business with the Anomaly, and Agate who escaped, and are facing a new threat from the Barians, and the Number cards with allies from Astral World, and Yuma Tsukumo. Co-Written with Ulrich362. SharkxOC, RioxOC, YumaxCathy

Critical point has been reached. BC Freedom no longer could remain in a way it was after Oarai smashed their last attempt at achieving anything in Sensha-do. However, a likely enigmatic source of change happen to come in aid throu accident, causing another ones to follow thanks to very peculiar girl earning an even more peculiar being in her soul...

After leaving BC Freedom Academy because of it's toxicity, Andou had to find a new answer to the troublesome necessity of finding herself a highschool. And what place could be the answer if not ambitious highschool far away south with talented students, questionably powerful leader and new Sensha-do team being created from leftovers? (AU after Das Finale)

The barrier has been destroyed, and the monsters now live on the surface in peace with humans. Shido Dreemurr, hero of the monsters, is living his normal life with the monsters and humans. Until one day, he decides to check out the phenomenon called Spacequakes out of curiosity.

After his friends moved into the castle with him, even Ralsei's days off are filled with craziness. But he wouldn't have it any other way. Just a silly little oneshot set in the Hopes, Dreams, And DELTARUNE universe.

The Minus Among Minuses And The Cute Loveless Has Taken Quite The Fall Underground (I Own Nothing)

after defeating Omega Flowey, Frisk returns to the surface and returned to her normal life. however, her guilt and regret draws her back to the Underground but is followed by a classmate who noticed her strange behavior. This person is Akio Uchiha. what turned into a chance encounter turns into a fight for his life as he ventures to the Underground and back.

The Avatar has the greatest power of all. Determination. The ability to persist through even the most trying of circumstances. But with the weight of the world on his shoulders, and an equally determined princess after him, will it be enough to restore balance?

mickey mouse kidnaps asriel and mario must rescue him!

Another war with the bad guys. Ink fought error, as usual. Little did ink know the adventure that awaited him… Rated T just to be safe

One girl fought till her last breath, to avenge the people who she loves. Another strive for perfection and approval. What would happen if one was summoned by the other? (AU StoryShift!Chara Strong!Chara)

my next vs fic! here we have two guys who are skilled fighters, but way too nice for their own good! so obviously let's put them in a fight to the death! we have the wannabe royal guard captain Papyrus, and the wannabe number 1 super villain Giovanni Potage! (watch epithet erased if you haven't already!) once again, omm and dbx inspired, no research, only death!