"YOU ARE NOT THE REAL PINKIE PIE!"
"You probably shouldn't even exist."
"You're only a clone, you don't HAVE any feelings!"

Who was she to believe? She was barely a day old, and already she'd seen the disappearance of her mirror images, all but her. Was she just a clone? A disposable unfeeling analog?
What would happen if she became her own pony? If she became real?

Is it possible for one of the Pinkie's, the only copy left behind, to develop? To become an entirely different pony to the one that she was modelled after?

Oh, and before I forget, thanks to the amazing WerewolfNobody for the (At one point) cover art!
Featured on Equestria Daily!

Kuno, a young changeling, is left weak, bloodied, and bruised after the events of the Canterlot wedding. She is soon discovered by Warden, a Royal Guard. But for some reason, Warden shows her mercy. Instead of taking her into the custody of the Royal Guard, he becomes both her captor and her savior. But over time, Kuno will come to ask herself the hardest question she has ever pondered: Can a changeling feel love?

The Cutie Mark Crusaders have always lived in the now, getting what they think needs to be done as a soon as possible, executing their plans just so they can move on to the next one right away, not thinking about the consequences till they’re right there in their faces. But when an attempt to earn their cutie marks goes too far, Sweetie Belle and her friends must face a horrible reality that sends their world into darkness and fear. How will the truth be uncovered and what will be sacrificed to undo this nightmare?

Just about everypony in Ponyville knows Scootaloo. She's your normal, carefree pegasus foal who crusades for her cutie mark, zips around town on her scooter, and looks up to her idol Rainbow Dash. But what if that's not all there is to her? Scootaloo worries that her friends will find out that she's not the foal they know and love, or that she's not even a foal at all. But, when her secret does come out, their reactions might surprise her.

A letter from Celestia interrupts one of Pinkie's parties with disturbing news. Now friendships will be pushed to the limit as Twilight struggles to uncover which of her friends is not who, or even what, she appears to be.

(While not a romance, this does contain a shipped pair)

in Russian

What are the chances your favorite pony was secretly a changeling all along?

Yeah, probably about one in one.

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?

In a poorly informed bout of revenge, Trixie has returned to Ponyville to make Big Macintosh and Rarity fall in love, because she's convinced this will prove she is the Best Showpony in all Equestria.
But Rarity's going to the spa with Fluttershy, Big Mac has chores to do, and Twilight hasn't the faintest as to why her best friend and best friend's brother are having an episode of freaky Friday...

This story will not be completed by its original author, though if one is interested, they can adopt the story and finish it as they see fit. Unpublicized story resources exist.

Twilight has always had feelings for Celestia. But whether these feelings are for her surrogate mother or for her imagined lover, nopony knows. It will take something strange to make her understand just what she thinks of the Princess; something like her conscience becoming sentient.

Discord managed to free himself from his stone prison, but some difficulties occured and gave him a new perspective as a pony. How will he adapt to these changes? And will his plan work this time?

Comments are filled with spoilers.