Nearly a year after arriving in Equestria, Anon has been turned into a bat-pony by accident. Now one of the general populace Anon will go on adventures causing mayhem wherever he goes.

So basically the same thing he did before becoming a horse.

It is a tale well known to all: Twilight Sparkle, immortal alicorn, forced to face the world without her friends. Time having separated them, never to meet again, leaving only one Princess all alone, the last to remember those happy times. Alone in her castle, mourning all she has lost.

...too bad certain ponies have no sense of the dramatic and are too inconsiderate to actually be dead.

As Twilight attempts to get Starlight Glimmer to see the error of her ways, Spike can't help but interject. If Starlight had a portal to take her to any place or any time, why fixate on one single event when she could accomplish so much more?

As it turns out, Starlight Glimmer has an answer. Several in fact.

Inspired by a conversation with the story's editor Tired Old Man.

It has been a decade since Twilight Sparkle was crowned sole Princess, and Equestria is at peace.

The Crystal Empire, not so much. King Sombra is apparently unkillable, despite all efforts. He returns several times a year to be destroyed, leaving behind his horn and always swearing vengeance. The jaded Crystal Ponies, some literally jade, have grown used to their tyrant attempting to return. Princess Cadance rules with her husband Shining Armor, while their daughter Flurry Heart excels in school. All is well.

All seems well, until Cadance begins to suspect that something is wrong with her daughter after the latest battle with Sombra. Flurry quite literally walks off a blast of concentrated dark magic. What Cadance discovers will shake her family to the core and upend everything she thought she knew about her daughter.

Flurry Heart is evil. If Cadance cannot save her daughter, she must stop her before it's too late.

Princess Luna, growing evermore aware that Equestria has come under attack in recent days by a seemingly invisible foe, decides to petition Princess Twilight Sparkle to allow her to found an organisation in order to combat the threat.

And so begins the strange tale of the Nightmare Knights, Equestria's newest reformed team of villains, as they bring peace, justice, order and security to the world--one ghastly ghoul at a time.

You might be afraid of ghosts. But they ain't.

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Additional tags: Anthology, Adventure, Mystery, Romance.

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Cover image provided by the wonderfully talented DenDoctor.

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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