Twilight writes to Princess Celestia for an explanation of an insidious issue Shining Armor told her about... but she ends up finding a secret that will change her life forever.

Short and thoughtful, with just a little pinch of humor to liven things up.
Simulcast en Espaniol
Many thanks to my proofreaders and pre-readers, Kolth, Sky Warden, and Colt, all from MLP Forums.

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes 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?

Princess Celestia always knew that Twilight Sparkle was destined for great things, but she never revealed the source of that knowledge, not even to those closest to her. When the day of Twilight's true destiny finally arrives, can Celestia fulfill an ancient promise to save Equestia's past, present, and future, even it means saying goodbye to Twilight forever? How can Celestia refuse her mother's last wish?

Art by the inimitable Harwick

Rarity discovers an old tradition involving the exchange of felt dolls as a sign of affection. This sparks a brilliant plan to play matchmaker with her friends, and between herself and Twilight.

But brilliant plans never go as expected, do they?

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Cover art by Acceleron
Chapter art by Ratofdrawn, Sketchyjackie, Dunnstar and fatalerror328!

When Spitfire finds herself grounded on the team injured list just before a show in Manehatten, she prepares for her life to crumble around her. The experience leads her to come across Rainbow Dash, temporarily managing the Manehatten weather teams. The two fliers will discover that sometimes it takes the darkest moments of our lives to find the brightest ones.

The Sequel: Feathers of Blue and Gold is out now!
Review in progress by Inky J
Video Review by Goomba Brony!
Video review by the wonderful ChaoticSeven!
Edited by the wonderful Taxus, Sorren, and Sojourner.
I do my own cover art.

Twilight and her five friends are transported during a botched spell, across dimensions to... Ponyville, Equestria? But not the same one that they knew. Sitting on a bench is Harpsy and Babar. The Doctoress avoids apples from an aspiring Applebuck. And in a library across town, six stallions join their forces as they try to decipher the appearance of filly look-alikes of themselves around Ponyville!

Cloud Kicker might just have the wildest life of any pony in Equestria. Marvel at the insanity that is her life, and laugh at the suffering of her poor beleaguered best friend, Blossomforth. And maybe, just maybe, there's more to her than just the lovable sex maniac everypony thinks she is.

This is a semi-sequel to "The Incredibly Dense Mind of Rainbow Dash." Not really a proper sequel, since it's focused on Cloud Kicker and Blossomforth instead of Rainbow and Pinkie, but it's in the same continuity. So I guess that makes it a follow-up-side-quel story. Or something. You don't need to have read "The Incredibly Dense Mind of Rainbow Dash" to read or enjoy this, but you ought to read it anyway, just because.

TvTropes Page

The central story of the Winningverse.

We got a tag for Cloud Kicker, but Blossomforth still deserves one too.

Twilight Sparkle, becoming anxious at the upcoming Summer Sun Celebration, which she believes marks the return of Nightmare Moon, beseeches Princess Celestia to do something about it.

Celestia, however, has another, more important task for her; making sure that the Summer Sun Celebration goes off without a hitch. Every year, a different town is chosen to receive the honor of hosting the grand festival.

And the lucky city chosen this year, for this fateful holiday, is none other than the city of Manehattan...

Cover image by Conner Cogwork.