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

Discord still has a lot to learn about friendship. Spending some one-on-one time with each of his new friends is helping. If only they wouldn’t get so upset about being turned into fruit or having their hair eaten.

What’s that? Make my life a living nightmare? Foolish pink pony! I’m Discord, the Lord of Chaos. What could a simple pony like you possibly do to me?

Inspired by the art of the ever so talented Madacon and a conversation with the stories editor Tired Old Man.

Whether they're pony or human, girls have one thing in common:

They talk.

They talk about life, they talk about love, they talk about each other. They talk about the weather, they talk about movies and music, they talk about the enormous magical disasters that threaten their world.

Whether they're pony or human, girls get together and they talk. And this is what they say.

A collection of short stories that may take place either in the Equestria Girls universe or the main Friendship is Magic universe.

This story is a sequel to The Moon, The Flower, And The Door

Effective Immediately, This Story Has Been Cancelled.

"Anyone Can Be A Wizard..."

Morning Glory has succeeded in passing Princess Luna's test, and is now her personal protege... and soon to be her foster daughter. All seems to be sunshine, lollipops, and fluffy puppies forever... until Luna makes a discovery regarding the young filly's parentage, one that could wound the young filly's heart terribly. Keeping this information a secret seems wisest, especially given the connection the young filly has with Celestia's new student, but it soon becomes clear that this is just the tip of the iceberg, as the filly begins exhibiting strange and seemingly inexplicable talents. The young filly seems intent upon becoming a wizard, in spite of being an earth pony. Is such a thing possible, and is Equestria ready for it? And if so, what kind of a wizard would she be?

One thing soon becomes clear: No matter what the outcome turns out to be, something big is about to happen in Equestria, and when it's all over, nothing may ever be the same....

In the wake of the Canterlot Wedding, Fluttershy has to ask Twilight a very difficult question.

Now available in spanish! Spinoff stories can be found in Would It Matter If I Made This Group?

Now with a TVTropes page.

A few days after the Nightmare Moon Incident, Spike awakens to find Twilight acting a little...odd. Or odder than usual anyway. All of a sudden she's being all motherly, sure of herself in ways she's never been before, and even more outgoing.

But…it’s kind of creepy how she just seems to know everypony’s name, or their habits, and even some stuff nopony else should know.

But she's still good old Twilight...right?

Featured 5/28/2014

After discovering King Sombra planning his latest scheme in their clubhouse, the Cutie Mark Crusaders soon learn they have a lot more in common with the tyrannical King than they might've thought.

Can two groups of blank flanks get along long enough for all of them to succeed? Or will Sombra's need for revenge instead lead all of Ponyville to ruin?

Edited by spigo.

PRINCESS TWILIGHT SPARKLE: DEAD AT 18

TELEPORTATION INVARIABLY FATAL, WARNS LEADING SCHOLAR

One look at the headline of the Canterlot Times and Twilight knew that she should have slept in today. But at least none of her friends would be silly enough to believe she was killing herself every time she teleported, right?

There is now a Spanish translation of this story, courtesy of Spaniard Kiwi

Rainbow Dash has an unusual way of learning, and Twilight’s determined to take advantage of it. Before she knows it, Rainbow’s worst fears become reality and her life unravels before her eyes as she becomes the smartest pony alive.

The dark tag is for the implications of the story.

An entry for the April 2015 write-off event, with the prompt “Great Expectations.”

Dust has lived on the edge of Ponyville all her life, keeping to herself and studying. She knows Princess Twilight, and so when she realizes she's made a big discovery, she's eager to run to the castle and tell everypony the good news. But when she goes into Ponyville, they don't seem very happy to see her.

Why would that be? She didn't do anything wrong.