After finding out about the disappearance of Flurry Heart, Shining and Twilight can only guess someone fillynapped her.
But who would do such a thing?
A past villain?
A random monster?
A new foe?
Only one thing's for certain.
They will find her, no matter how awkward it might get.

In order to improve their skills at detecting changeling infiltrators, Twilight Sparkle and the Council of Friendship ask their new friend Thorax to help them with a little training exercise. Their goal? Figure out which of their six friends is actually Thorax in disguise.

Dialogue heavy, as this story focuses on the cross-interrogation of the game itself.

Note: This story takes place before "To Where and Back Again."

Luna has had enough of Celestia's games, and has found the perfect means of revenge. Using a long-forbidden spell, she transforms her sister into little more than a small filly, all so she could pull the greatest prank ever. Unfortunately, she soon learns that before you fool around with dangerous magic, you really need to read the fine print...

A sequel can be found here.

Twilight Sparkle never was a Unicorn and she didn't even know it.
What happens when her true heritage comes to light? Will she willingly embrace it? Or will she be forced to?

Beware of spoilers in the comments!

Edited by uTTerAbsurdity, Zervziel, Stormwatch and Gwenio

Cover art by the talented Cartoonlion and colored by the equally talented Stormwatch, original can be found here

Click here for the Tvtropes page

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Shortly after Zephyr Breeze graduates from mane therapy training, Fluttershy consults Rainbow Dash and asks if she can keep an eye on Zephyr. Follow Rainbow as she deals with Zephyr and all his antics on her weekly visits!

Shout out to MarioDS01 for letting me use the idea!

When Rainbow Spectrum has a dream one night about her village being attacked, she thinks it's an ordinary nightmare, but when she keeps having it again and again, she realizes it's anything but ordinary. With nothing but the help of her best friends, an easy going DJ, a sarcastic unicorn, and a bossy book writer, she sets off on a quest to save her village.

There were many things Chrysalis was prepared to lose. Her hive, her children, and her crown were not amongst those things. Fleeing her old home, with no one to turn to and nowhere to feed, she stumbles across a town she didn't know existed.

From serendipity hatches an opportunity. From opportunity, progress. And perhaps, one day, even redemption. It is a long way off. There is a lot for her to confront, both in her past and future. But she has a lot of time in exile.

(Despite the image source, this story is not canon to the comics.)
(Also, as might be fairly obvious, this story takes place in the aftermath of the season six finale.)

Twilight Sparkle and Timber Spruce have been dating ever since the events of Camp Everfree.

But some time later, Twilight asks Sunset Shimmer to meet her in the school lab. Because Twilight has relationship worries—lots of them, and Sunset's the only person she trusts to help.

Part of the Montage Cinematic Universe.

Edits: nanashi_jones

Things between Celestia and Luna are getting worse than ever, with both Princesses unable to reconcile their guilt over the events surrounding Luna's banishment. With the leadership of Equestria fraying, outside forces long forgotten by the subjects of the sun and moon take the opportunity to settle an old score.