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

"Hey, uh, Rick, what did you want me to, uh, write down here again?"

"Look, Morty, it's not that urp complicated, just, just write down a generic description of what we did."

"But Rick, we did a lot of things!"

"Then figurp it out, Morty. Christ, and here I thought you were getting at least a bit smarter. Just, write down something about, uh, 'Rick and Morty Get Stuff From Horse Land'. 'Morty and Rick and something something horse pun'. I dunno, something."

"I want to go back to the ponies..."

"Oh, I bet you would like that, huh, MMMorty? Go back to the girly dimension full of urp friendship and magic and all that. Look, just give it here, I'll, uh, just put it up as it is."

Now with coverart by some guy named Shadow Bolt

There are over 21 Heroes in the sci-fi shooter game Overwatch, each with their own unique abilities, backstories, and merits. Some are good for attacking, some for defending, some for healing, but they are all good for something.

That's what Sunset thinks, anyway. Rainbow Dash wholeheartedly disagrees.

From the very beginning, I only knew what I have got from my Father. Yet, through all these years living in Bradley family, I couldn't help but notice many things. Strange things happening around me. Strange things happening within me. The things that are not logical. The things that are hard to understand, for I feel only one emotion. I am Pride, the first Homunculus. And today I have to start my life from the very beginning...

"Fullmetal Alchemist: Brotherhood" crossover.

Inspired by the story "Family" by FleetlordAvatar.

EDIT: Featured? Oh, wow! (19.09.2017)

This story is a sequel to No, I Am Not A Brony, Get Me Outta Equestria!

After leaving Ponyville, the human TD Harrison Powell finds himself in even stranger territory than the land of the ponies. Will he find his way home? Or will he find out that he should have stayed in Ponyville under the watchful eyes of the Royal Sisters after all?

Edited by the amazing Jack Kellar and Marioland1

Special thanks to MyHobby for the cover art!!

I'd heard about the TV show My Little Pony: Friendship is Magic from my college roommate who is way too into the show. Disturbingly so, actually, but good gravy I would never watch the darned thing! What am I, five? I've got better things to do with my time than watch a silly little girl's show. However, that didn't stop... something from transporting me into the world of the show, so here I am... in Equestria... trying to get home. This is gonna be interesting.

Special thanks to GuyFace, Jack Kellar, Storm Shaker, Spiffy McSquee, and Goober Trooper for helping me with this one!

What was originally meant to be a single piece, this story, its prequels and sequels, focus on the mane six and their dealing with being the Elements of Harmony, how ever long that will last...

Be Awed and Amazed by the tale of Sweetie Belle as she traverses the multiverse in search of her lost mentor and friend, Twilight Sparkle! Will she find her in post-apocalyptic Equestria? Or maybe in a strange world where everypony is the wrong gender? Or even where a Pony claims to be a human? Read as she journeys through very familiar worlds you might have read about... if you dare!

At this point in time all the main worlds to be visited have already been chosen. Thank you all for the suggestions, and I hope you enjoy the surprises!

Here's the official TSC:F Music Intro: The Sweetie Chronicles: Fragments

WDTP: S2/3-CE
You can also visit the TV Tropes Page which has spoilers!

Pinkie Pie is being tormented by horrific nightmares. Unable to deal with it by herself anymore she seeks out Twilight's help, but will it have been the best decision when she finds herself alone in an abandoned, fog filled Ponyville?

Sequel: http://www.fimfiction.net/story/4676/Too-Shy-for-a-Rainbow

There have been a LOT of high-quality readings of Silent Ponyville, but this one is my personal favorite:
https://www.youtube.com/playlist?list=PLGh01rbB4o3xoSV7a6Omc-UJROXHRZ1Hv

Okay, I don't know if anyone can hear this, or read this, or whatever, but I'm trying my best to use Pinkie Pie's legendary fourth-wall-breaking powers to try and get a message out.

If you can hear this, I need help. I'm in Equestria, and man, this is strange. But I'm also stuck in Pinkie Pie's body, for some reason.

Yes, it's just as weird as it sounds. And now, I need your help... because all the ponies in this town think I'm crazy!