A few days after the Nightmare Moon Incident, Spike awakens to find Twilight acting a little...odd. Or odder than usual anyway. All of a sudden she's being all motherly, sure of herself in ways she's never been before, and even more outgoing.

But…it’s kind of creepy how she just seems to know everypony’s name, or their habits, and even some stuff nopony else should know.

But she's still good old Twilight...right?

Featured 5/28/2014

[Featured on EqD and FiM Fiction] It is that time again, the dreaded flu season. Not even Princess Celestia, the ruler of the sun and day, is safe from it. When Celestia contracts the flu, what pony could possibly nurse Celestia back to health? Why none other than her dear, loving sister of course! Enter Nurse Luna!

Between crazed guards, a palace staff desperate to please their rulers, and a crazed unicorn running around, no pony is safe from this madness.

This is 100% Approved by Twilight's Library.

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.

This story is a sequel to I Dream of a Genie with a Light Brown Mane

While pet-sitting for Princess Celestia, Fluttershy is tricked into letting a monster most vile escape from Tartarus. Soon afterwards, a curse befalls the Princess of the Night, making her unable to yield for the sun. Rumors quickly spread of Nightmare Moon's return, and that Discord is responsible. To make matters worse, Discord finds that his chaos magic cannot fix the problem, at least not permanently. Despite his efforts, the curse continues to return.

Fearing that this is the work of her greatest mistake as Nightmare Moon, Princess Luna embarks on a quest to discover the truth, set things right, and clear her name. But she will not be traveling alone. Overcome with curiosity himself, the Master of Chaos accompanies her (much to her chagrin), along with the Element of Kindness, a grumpy bunny, and a mischievous phoenix. Many perils will be faced, and many dark secrets will be revealed. But at least with Discord around, the trip will be anything but boring.

Part III of the Orthrus Trilogy.

This story is a sequel to More Than Trust

After the happenings of More Than Trust, Discord must learn to deal with his new state and manage his relationship with Fluttershy. The latter is easy, but the former is something that he hadn't even thought about handling. It's rough, but that's okay. Fluttershy's there to help him.

She's always there.

However, no amount of comfort from Fluttershy has been able to quell it. It feels familiar, but it's a stranger to him.

Is it right to hide it from his love, or could she be hurt in the process of keeping such a secret?

A DiscordXFluttershy ( DiscoShy / FlutterCord ) fanfiction sequel.

The tyrannical Shadow Stallion oppresses Equestria, coating the land in a thick layer of clouds, tightly controlling the population. Three children, the unicorns Celestia and Luna, along with a Draconequus, Discord, must live up to their fate. They must find the Elements of Harmony and take up their rightful place as Equestrias new gods and saviors.

Adventure and Friendshipping mix, intended to be a possible prequel to the show. Featured on EqD since January 09, 2012. Six Stars.

This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169