This story is a sequel to Sharing the Night

Twilight Sparkle is the alicorn of the stars, and after a period of self-discovery, ancient-goddess-discovery and a minor case of malmanifestation madness, she has finally come to share the night, a city, her ex-villain status and a bed with Luna, the alicorn of the moon.

Things are looking pretty good for her.

The five demigoddesses she created out of spite? Not so much. Celestia and Celestia are a little lost too, and for some unknown, completely mysterious reason, dragons are flooding into Equestria—and they're not acclimating. Someone probably should do something about that.

It never gets dull in Ponyville, does it?

TV Tropes

After the Changeling invasion, Celestia and Luna make the decision to have Twilight investigate the Elements of Harmony and solve the mystery of their power.

A thousand years later, Rainbow Dash awakens in a world she does not recognize. She has no idea how or why she came to be there. She does not know the language, the geography or any of the rules of this new time. She soon finds allies in Star Fall, a scholarly pegasus whose Talent is Magic, and Astrid, Star Fall's Griffin guardian. Together they set out to discover why Dash has been sent to the future, and how she might return to when she belongs.

War threatens the nations, a Nightmare stalks the shadows, and Rainbow Dash's arrival has turned her into a wild card in a deadly game that pits the law on both sides of a broken Equestria against a mysterious criminal figure, Max Cash. Yet the stakes are higher than anyone knows, for in her research Twilight Sparkle discovered a dark secret about the Elements, something that will shake the foundations of the world.

Cover image by SierraEx
Has a TvTropes page

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

[Complete! With TVTropes apparently!]
Also, apparently, an animated trailer.

In a world of brass and steam, Twilight Sparkle had thought she had made a life-changing discovery with the invention of the telescope. For better or worse, she was correct.

Now her discovery has not only changed her life, but the lives of those she seeks out in her desperate attempt to contact the only other creature as lonely as Twilight herself.

It all would have been much simpler, but it had to be the one Twilight could only call The Mare on the Moon.

Decidedly not within walking distance, then.

[Featured on EQD before story was meant to be submitted. 4/03/2015]

[Editing team: Southpaw, Wolfvenom, Maskedferret, SwanSong and BluePaladin42, without whom this story would be a fraction of its current state.]
[Special thanks to Novel-Idea for the updated cover]

Spike doesn't know how long he's been running - he just knows he can't stop. He doesn't know why the ponies keep hunting him - he just knows they won't stop. From the sky, from the earth, from the water and all the between places, the ponies emerge with their tricks and their ambushes and their unrelenting hunger. He's just the appetizer in a banquet that never ends.

Thanks to a certain crazy person who would like to remain anonymous, this story now has a cover that actually looks good! You can find the commissioned artist, SapphireGamgee, over at Deviantart. Just, uh, be careful when you're browsing the 'More from Deviantart' section. Things get really weird, really fast. I blame myself for this.

If there's one thing we can count on, it's Twilight Sparkle, prized student and newest princess, to botch up a spell in her quest to master all of magic.

This time, it propels her to a new world, this one not inhabited by bipeds, but ponies like herself, and yet not like herself. She has entered the realm of Everglow, where the queen is a queen, and ponies suffer horribly lethal combat much more often than Equestria could manage under the peaceful reign of its alicorn caretakers.

Will she find her way back home, to her friends and responsibilities? Will she survive the harsh new realm she has entered?

Based on Ponyfinder. Want to support the author? Check out his Patreon.

This is the story of the end. This is the story of the death of Equestria. It is the story of the reign of her royal majesty, Princess Twilight Sparkle of the Fading Sun.

The alicorn sisters are dead and Equestria has turned to Twilight Sparkle to guide it. However, just maintaining a dim sun a fraction as bright as her mentor's keeps the new princess near her limits.

Years have passed and Twilight Sparkle is sure of only one thing. Equestria is dying.

NOTE: Written before "It's about Time" in season 2. Everything after "Read it and Weep" was ignored throughout this story.

A long time has passed since Twilight and her friends first discovered the Elements of Harmony, and she has since become a full-fledged alicorn princess. In that time, she's done many great things.

But the one thing she hasn't done is tested herself. She's never seen the full extent of her powers.

Growing bored of Equestria, and seeking the ultimate challenge, Twilight decides to see just how powerful she really is by attempting the impossible.

Creating her own world.

Idea taken from a brainstorming thread and used with permission from Kapuchu.

Special thanks to Conicer for the epic cover art!

In the far reaches of Canterlot Castle, high above in the towers lived the archmage. Everypony knew her, yet few had met her.

Twilight Sparkle sighed, having teleported away another noble seeking favors before reaching the top of the stairs for the second time today. They never learned. As the archmage, she already dealt with political squabbles far too often without inviting them into her home. Aside from personal favors for Celestia, she did what was required of her position and then returned to seclusion and research.

The nobility grumbled that no archmage should be a commoner, and Twilight’s disrespect toward them proved it. Each and every time they were forced to bow to her, they hated what they saw: the position, the status, the deference.

Was she not powerful? Was she not great?

Twilight, now reading through dusty scrolls and long forgotten tales, wrote in her notes — notes gathering dust of their own. A brief thought flashed through her mind.

Am I not powerful? Am I not great?

And then Twilight picked up The Tale of the Royal Pony Sisters.

Defunct side stories told in Across the Boundary. They can still provide a little context, but when in doubt, the main story here is canon.

Cover art provided by Lafiir