Displeased with her tutelage under the princess of the sun, Sunset Shimmer leaves through a mirror deep within the vaults of Canterlot. With her trusty companion Philomena by her side, Sunset steps into a new world. But not the one the book said it would be. A small calibration error will leave two worlds of magic irrevocably changed.

A crossover with the Harry Potter books and a Sunset in Hogwarts story.

Now with editing courtesy of Rainbow Sparkle

[Cancelled] After capturing Twilight during A Canterlot Wedding, Chrysalis decided that keeping her and Cadance locked up underneath the place would be too risky. Instead, she forced them through an ancient mirror-portal said to contain an impenetrable prison created by Starswirl himself, shattering the mirror in the process.

Now, Twilight and Cadance must adapt to a new world and new bodies. Without any magic at their disposal, they must attempt to build a new portal and prepare to face Chrysalis on the other side while also maintaining the guise of normal high schoolers. Luckily, they aren't the only ones interested in reaching Equestria, and they'll cobble together an unlikely alliance of beings from both sides of the mirror to help them in their quest.

A Canterlot Wedding and Equestria Girls AU that, rather than aiming to be a fixfic, simply takes an alternate (and perhaps longer) path.

In the darkest moment of Twilight’s life, where all who she cared for have left her, a voice gives her comfort. It tells her that she is not weak, that she is not worthless, that they were foolish to ignore her. When she is offered power and knowledge that was denied of her, Twilight accepts and changes the fate of Equestria.

This story is going through revision and some editing, anything mentioning Nemoroth or Horus should be ignored.

This story is a sequel to What Have You Done?

Chrysalis, the Changeling Queen, has taken her prize, unhindered by Equestria's precious heroes. Celestia is little more than another prisoner of war now. The Bearers of the Elements of Harmony are lost, and the Elements themselves have turned away from Equestria's plight. As the world they once knew begins to crumble, a single question is asked among the people as they look up at their fallen heroes.

There is no such thing as "miserably ever after," for someone will always be fighting for things to change. Hope doesn't die just because someone's turned off the lights. Truth doesn't vanish when deceit begins its reign, and Harmony can only shine brighter among chaos.
Even as this world falls, we'll work to build it up again.
Even as you lose yourself, you can find greater things within you.
Even as fear rises up like a tidal wave, we'll forge a sanctuary to stand against it.
Even as you break, someone will always be standing there next to you to carry you through it.

Cover art is by Odin-odin.
Story theme (Equestria in Grey) is by Omnipony.
Main Characters are Twilight, Velvet, Discord, Nightlight, Luna, and Chrysalis, in that order.
See you in the comments, my dear readers.

Words and actions can sometimes hurt more than we know, sowing betrayal and hatred where friendship and innocence lies. A single thoughtless action can be a tipping point, one fallen domino setting off hundreds. Look back, and answer me.

(Brand-spanken new) TvTropes page here
Story theme is Chronophobia

Twilight Sparkle is not in a good place. Shunned and abandoned by her friends, her mentor and even her family for a thoughtless outburst at the wedding rehearsal. But she still has friends in Canterlot, even if she forgot about them.

Oh yeah, and somepony should probably do something about that whole changeling issue.

Written under the prompt "Warrior Twilight" for FOME's Imposing Sovereigns Contest.

A thousand years ago, Princess Celestia banished her sister to the moon, that much we know. What wasn’t known, and what Celestia kept secret was that before her banishment, Luna had given birth to a foal. Now a thousand years later, as Nightmare returns to Equestria to bring about Eternal Night.

Twilight Sparkle, protege of Princess Celestia, struggles against the tyranny of this ancient foe. But how will she be able to save herself and her friends when the truth of this ancient legend crashes down upon her? Twilight will have to confront herself...and her heritage.

Polaris501

Quiet mornings before school starts can be lonely, but peaceful. For some people, they're a good time to just breathe and prepare themselves for the day ahead. Fluttershy and Adagio Dazzle find themselves doing this in the same place at the same time, in their own ways.

Based on a picture that was a little too big to be the cover art, but cute enough to inspire some shipping anyway.

Now comes with actual cover art courtesy of SkycatcherEquestria!

Comments may contain spoilers!

Now comes with Trope page!

The ponies of Equestria know Harmony as not just an ideal, but as a force that actively shapes their existence. It guides them through their lives, brings them prosperity and ensures good will triumph over evil most of the time.

However, exposure to it can be unpredictable for those crossing over from other realms. Sufficiently long stays in Equestria can even lead to a change of form to one indigenous to the land.

And those unlucky enough to be slated to become a source of Harmony itself may find themselves unable to leave.

Translation: This fic contains the gradual transformation of a human (male) to a very young alicorn filly.

Set just before Season Five. Non-Earth human and an Equestria that's slightly different.

Cover Art by the talented Mix-up check out his work here: http://amalgamzaku.deviantart.com/

There's a bakery in Canterlot. Benny Bakery. Nopony knows what a 'Benny' is, but they all agree that this place has some of the best delicacies Equestria has to offer. There's one thing though, it's really exclusive and the pony who runs it is a bit of a mystery. Wait, is it even a pony? Well, there's only one way to find out.

A request by a follower Xenomorpher.