Pandinus Imperator (You can call him Pan, he won't mind) is knocked back in time during the Canterlot Invasion, and accidentally kills King Sombra on arrival. Instead of being executed, the changeling is surprised to find himself being hailed as a hero, and is promptly put on the throne as the new monarch, the Crystal Emperor. However, Pan now faces a great many problems, among them Celestia and Luna, who seem certain that the changeling is secretly up to no good, as well as several political factions secretly plotting to undermine his reign. There's also the tiny problem of the constant snowstorm that threatens to cut the city off from the outside world permanently.
The Crystal Ponies need a hero now more than ever before. Why did they get a changeling instead?

We Has A TvTropes.

While not truly a part of Bucking Nonsense's Changeling-Verse, the same rules regarding changeling abilities and society apply.

Cover image provided by gabapple, used with permission.

In a world where she sees from a distorted perspective, all Twilight Sparkle can do is cling to the one pony she knows will never let her down: her teacher, the princess... no matter which princess her addled brain tells her that is. Twilight's used to rewriting letters, but when she's the one being rewritten, she finds the sensation to be altogether different.

Many thanks must go to my awesome editors, Varanus, Ebon Mane, shortskirtsandexplosions, Seattle_Lite, and Nick Nack.

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There's been another sighting of the mysterious Mare Do Well...but this time, all of Rainbow Dash's friends plead ignorance, insisting that they've put aside their costumes for good. Rainbow Dash is determined to uncover the masked mare's true identity before she's humiliated yet again, but this time around, the vigilante seems especially interested in her as well. Will Rainbow Dash be able to solve the mystery before the culprit takes the hoax too far? Or is she in danger of losing not only her mind, but her heart?

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You'd think that being trapped in stone would mean that, if nothing else, I could get some peace and quiet. Unfortunately, it seems that Celestia has other ideas.

She has appointed these ponies... these 'Keepers', as she calls them, to keep me entertained during my incarceration.

Honestly? I'd prefer the boredom.

Cover art by matrosha123
Spanish Translation by SPANIARD KIWI found here

After her complete defeat at the royal wedding, Celestia's ego is shattered. Luna promises to whip her sister back into shape, because it'll take far more than a few laps around the palace to put a grown alicorn at the top of her game. But, with Celestia coming home each day with a new set of bruises and a slightly more forward royal attitude, her subjects begin to fear her more than love her. Is Luna's

special training turning her into a monster, or is it all according to some greater plan? It's time for some tough love!

(Warning: Dark tag for some Celestia abuse.)
(Featured 6/19/2012! :D)

A sequel to 'Hiatus' - Spurred on by her sister, Luna decides to open a summer camp dedicated to the arts and sciences in an attempt to become further involved with the daily lives of Equestria's citizens, hopefully improving her reputation in the process. The campers that sign up prove to be more than what the Princess of the Night was expecting, however. 'Camp Counselor' certainly wasn't supposed to be part of the royal duties.

The Cycle of Days (Luna's Lullaby) - Written by Ariamaki
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After being brutally rejected by Rainbow Dash once again, Scootaloo is left distraught. that is until a kinder pegasus comes into her life and shows her some compassion.

Picture by Kloudmutt http://kloudmutt.deviantart.com/

After a thousand years, Luna finds herself finally freed from the form of Night Mare Moon - the ordeal has left her weakened, though, and she is ordered to spend the next year regaining her strength and getting herself up to speed on what has transpired during her thousand-year absence. Finding ways to spend that time? That... might be troublesome.

Sequel to 'Hiatus': 'Stuck In The Middle With You' (Slice of Life)
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Spike only wants things to stay the same. Time, however, has other ideas. He's going to need a lot of help... An everypony story.

(Cover image by Rannva)

Twilight breaks Celestia's doors.

But then, you'd be mad too, if your stupid brother got drunk and told you that you were adopted...