MLP/Undertale crossover.
Not a PWNY-verse story.

Long ago, the Monsters and Humans fought a great war. The Monsters lost, and were sealed in the Underground. It would take the power of seven human souls to break the barrier that kept them imprisoned. They only had six. And so the Monsters waited and hoped, praying that another human would find their way to the Underground. Some thought the seventh soul would give their King the strength to break the barrier. Some dreamed of a human who would be their friend, and save them all...or had nightmares of one who would bring back the war.

...but nobody came.

...but somepony did.

Eons after the war, with no way to tell how much time had passed above, a tiny blue filly with wings and horn fell into the underground, calling for her Mama. None knew the poor creature's nature or origins...but her soul was powerful with magic, even more so than a human soul.

None can know what will come...of this little 'Woona'.

Cover art by Sanyo21

There is a universe out there titled Equestria Divided. It is aptly named, as the Mane 6, the former Elements of Harmony, now wage war for total domination of Equestria. Battling for a world that has lost Celestia and Luna, each fights for what they believe is right, each will go to extremes. How and why this happened, is not completely known, but what is sure is that something needs to happen to stop this war, before everypony, every being, is destroyed by it.

That's where Pinkie Pie, from another universe, comes in. Brought by mysterious forces, the party pony is very suddenly imbedded in the middle of this war-torn world, and must learn to adjust to a violent life to survive, and thrive. She will have to endure to fighting with lethal force, and the shock that it entails,while partly deluding herself that she has somehow wound up in some complex game.

So what caused the splitting of Equestria Divided? What are the plans of the five Houses, and the mysterious Cult of Laughter? How can Pinkie Pie keep up with the war, the loss and pain, and having to keep her new friends (who are still technically her friends of old) safe? The only way to possibly do that, is to keep calm, party on, and carry a few badflank weapons for fending off evil forces. And they range from the trotting dead, to warmongering pegasi troops, to pyromaniac unicorns, to... Celestia knows what!

With what humor she can muster, to keep her pony self sane, she realizes this isn't going to be easy. But it must be done. So you're invited to watch as events unfold, in one big spectacle after another, as a warrior blossoms!

Equestria Divided: The Pink Samurai. She's here to fight Houses and the Cult, Pinkie Pie Samurai Style!

This is inspired by the incredibly creative PoorYorickDA on DeviantArt (Equestria Divided folder Here). Go check him out, read his journals, and tell him how awesome he is. I have his permission for writing this, and I hope he enjoys it as much as I enjoy writing it.

The artwork (a current work-in-progress) is done by the incredibly talented CuttieArtGirl on Deviant Art. Her work is amazing, detailed, darling, and I could go on about it. She is NOT a Pegasister, however, so please don't ask her about MLP, or request them. Still, go to her and tell her how awesome she is!

(Consider this story to be what would happen if we could make a game out of this and novelize it.)

Rainbow discovers that she has a pest problem in her house. The pest turns out to be both cuter and more annoying than she expected.

A winner of the 2015 Bat Pony writing contest.

Russian translation by KoylanGOLD
Also read: The Most Annoying House Guest

This story is a sequel to Trials of Blood and Kindness

Mistress Flutterbat has been living with her family in Cloudsdale, where her parents did their best to lead the local clan of thestrals in peace for centuries. However, after a terrible tragedy that changed her life forever, the young thestral was forced to flee Cloudsdale and seek a new home in Ponyville.

Now known as Fluttershy, and with Rainbow Dash by her side, she is trying to heal old wounds in her heart and find a meaning to her empty life.

Will a vampony with a good heart and kind nature survive in a world that sees her as a threat?

Will she be able to keep a low profile, away from the silver arrows of monster hunters?

And most importantly, will her friends help her during these hard times, or will they ultimately turn against her?

This story takes place years before Nightmare Moon’s return.

List of editors, thanks for your help, you did a great job:
ShipIsLove ShipIsLife
Soge
Alticron
Word Worthy

Thanks for assisting with Zecora’s sentences, it really improved her talking style: Discord_Lexia

Thanks for pre-reading and assisting with the funeral scene:
Rated Ponystar

In the depths of Mt. Ebott, a voice through Space-Time echoed softly through the cavern, and in its center where daylight shone through, lay a flower patch where a young soulless monster sat glumly. Suddenly the monster is thrown into a world where peace and Harmony reign.

On her way back from one of Pinkie Pie's parties, Applejack was bitten by a strange timberwolf. After that night, the others noticed that Applejack has been acting a little strange. And after pony couple were attacked by a strange pony-like timberwolf, other decide to investigate. It's soon discovered that Applejack has been changed to Timberjack. And the only way to stop her is to enlist the help of a friend of the night...Flutterbat!

This fic was inspired by the original art and came from an RP with a fellow author

Co-authors: fluttercord45, GivingSpider

Featured on 10/12/15!!!
Featured on 10/24/15!!!!
Featured on 10/31/15!!!
Featured on 11/08/15!!!

SEQEUL: https://www.fimfiction.net/story/295946/dont-worry-we-wont-bite-sequel-to-night-of-the-werewolf

"Stay away from me!" She screamed as her body changed under the light of the moon, her pupils small as pebbles, blood dripping from her hooves, and mouth as they became more wolf like. "I don't want...to...to hurt...you..."

Her body went limp as she fainted, her fur and mane frazzled, paws replaced her hooves, sharp fangs going just past her lips. Vinyl stared in shock as the wolf-like creature lifted itself from the floor with a low growl. It turned to Vinyl, canines bared. It rose its head and let out a loud, mournful howl, and attacked. Vinyl by now had been scared past her wits, and having read a fair amount of folklore herself, expected to be mauled. But instead,

It licked her...

A mother will do a lot for her child, even give them up if it meant them having a safer life growing up, despite the obvious pain that comes for the parent.

That pain is something Queen Chrysalis has gone through for eighteen years, but now the time is upon them, and she wants her daughter back. Even if that means invading Canterlot during a royal wedding.

Edited by RC2101_Copey
New cover art was created by the talented Jesuka
Now has a TVtropes page: http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Change
Go watch the reading by Skijaramaz: https://www.youtube.com/watch?v=Ecqtu_Djrw4

(Featured on 18/10/2015, the first day! Thank you!)

Change is now a printed book, information here: https://www.fimfiction.net/blog/732008/i-got-a-thing-change-is-now-a-physical-book

This story is a sequel to I Have Returned

Five years after the Death of Princess Celestia, humankind and ponykind share a struggling peace. A rebellious army of ponies wanting to return Equestria to its former state called the 'Sun Order' are wreaking havoc across the planet. Fearing for the safety of her planet and the ponies who support the UNSC, President Luna receives aid in the form of Kilo-Five, now lead by Jane Arimondo. Their mission, find out where the 'Sun Order' is hiding and eliminate them. Meanwhile Spartan Crimson is on a lone mission to track down a insurrectionist trading route, and put a stop to it. Little do Jane and Crimson know that their paths may soon cross again, as an evil plot silently unfolds in the darkness....

This story is a sequel to Our Pasts That Haunt Us

It has been a month since the last events of this story where Applejack died tragically, Pinkie Pie became entirely unstable, and Spitfire returned on a journey of self healing. It is here that Rainbow Dash finds one gem of hope in her world, dropped down to her from somewhere in the infinite universe. In this last month Dash and Spitfire have been talking almost nightly, as the Wonderbolt captain tried to repent for all of the wrong doings she did to others.
Dash still suffers a pain in her heart, and Spitfire wants to heal it but must first heal herself. That aside all of the pain from the last story inevitably made Pinkie Pie a victim of a dark vengeful heart, and much to the residents of Ponyville's displeasure, she also became psychotic in her tendencies. What will it take to bring the old pink party mare back to reality, Rainbow will have to find the answer to this question in her heart as well.
THIS FIC IS WRITTEN IN ANTHRO FORMAT! (If you are absolutely disenchanted with the idea of reading anthro don't read, but I really think you can get past it and imagine them as normal ponies. Stories are all in the imagination after all!)

Also Artwork is obviously not mine, nor does it represent the ANTHRO tag in my story. Yet it was the best possible match. Credit to the actual author and NOT me.

Has also been featured in Pedro Hander's Featured Muffins(July 18th, 2014)!