With Twilight Sparkle's ascension to Princesshood, little fillies across the world dream away with the knowledge that any one of them could become a Princess themselves, somehow, some day. Unicorns dream of sprouting wings and tasting the clouds, Pegasi imagine what it might be like to conjure from thin air, and the Earth Ponies...

Well, they've always been a practical people. "Keep your hooves on the ground and your head with your hooves," as they say.

But one little Earth Pony wonders how different her kind is from the fiery Pegasi and crafty Unicorns - What does an Earth Pony have to offer that they don't?

So, she does some light research on the inherent magics of ponykind, and how they tie together into the apex form known as an Alicorn.

She is less than pleased with her results.

--Rated Teen for some dark, dangerous, and mature situations which may not be appropriate for all audiences--

What if…  Sunset Shimmer had not just wound up at Canterlot High when she passed through the mirror, but instead had found herself in a world of supervillains and heroes, where costumed characters fought it out in the skies of New York and one young woman with no powers in this world did not have a chance to rise to her destiny.  So she decided to fix that problem, only to find her problems had just begun.

Meet Summer Lewis, a young supervillain created by The Consortium and later freed of their control by the Guardians.  Since then, she has passed in and out of the justice system, most recently released on probation only to find keeping on the right side of the law is far more difficult than it seems.

Much like where she came from originally.

Alternate universe story where Sunset Shimmer, Trixie, Flim & Flam, Suri Polomare, Lightning Dust, and Gilda are the main characters. What could possibly go wrong? A lot, in fact.

After an adventure to find the Elements of Irony to defeat Nightmare Moon, Sunset finds herself stuck living in Ponyville. Absurd comedy awaits as she and her friends acquaintances have equally absurd misadventures where no one seems to learn anything.

Tanya Degurechaff gets tossed into Equestria and transformed into a Changeling Queen. It's a nice retirement from modern warfare as an aerial mage. Then Queen Chrysalis attacks and forces her out of retirement. Historians refer to this as 'a bit of an oopsie.'

Zenith would give anything to find her lost sister Nadir, who vanished in the depths of space long ago. And now, after decades of suspended animation, she has finally located Nadir on a strange planet haunted by alien ruins, far outside known space.

It's lonely out there, but Zenith has company – six personalities simulated by her ship's AI. And she'll need every ounce of help Twilight Sparkle, Rainbow Dash, and the others can offer, for Lapis is a more mysterious, and dangerous, planet than she could ever have imagined.

Updated every-other day until Jan. 6.

An entry for Bicyclette's Science Fiction Contest.

The Ponyspawn have invaded Equestria, and it is up to the newest addition to the Grey Wardens, Twilight Sparkle, to find the means to drive them back! With her friends and allies at her side, can Twilight defeat the evil tide before all of Equestria is devoured?

The Sequel, Pony Age: Catalyst, is available.

Sequel: Left Behind: Sunny Disposition
Apparently it was scouted and is on EqD too

Nightmare Moon was meant to be released after a thousand years. A momentous occasion for her but terrifying for all the ponies on her day of freedom. She would get revenge on her sister and cover the world in darkness and shape everything to fit it.

That was the plan, at least. Instead, something went awry with the spell and she wasn't released when she was supposed to be. The mare-in-the-moon is brought into a world with stagnated technology, giant cities, and no sign of her sister or any of the other immortals. In fact, ponies don't seem terrified of her at all, and the stay within the core of her powers infused and changed the alicorn's body drastically.

The alicorn had no obstacles left! But...she was also a relic of the past. A past everyone seemed to have forgotten. A past she could no longer look upon.

Artwork by ElkaArt. Link in source.
Big thanks to Kryostase for helping spot errors I've missed.

Fire Fight, a young colt with a knack for combat, and a strong sense of justice, has lived a life riddled with belittlement from others for being who is, or at least wants to be: a hero. Fed up with feeling like a prisoner of his own special talent, he runs away from the land that disapproves of it, and embarks on a quest to help other foals like him. Together, Fire Fight and the friends he makes travel the lands endlessly searching for peace.
They begin to discover themselves along the way, as well as hidden places and secrets that will serve to strengthen them, and their friendship.