Anonymous the human has been summoned to Equestria just outside Ponyville, by a powerful unicorn who died in the process, when the spell he cast transferred all his energy, which included life energy.

With no way back, new powers and new friends. Anon tries to adjust to his new life but nothing is ever perfect.

This is set in season 7.

This story is a sequel to My Little Pony: Nine Elements Book 2

The story continues with season 3.

This retelling is partially inspired by SuperPinkBrony12's MLP (What If?) series. (Start here if you're interested.)

My Little Pony (C) Hasbro.

Sequel to Life of a Wanted Changeling Season 3: Tyrants, Terrorists, and Tiaras, Oh My!
3 Months after Twilight Sparkle has been Crowned Princess, You and your family are still wanted by the world at large, but that won't stop you from your next quest. You (Bugze the Changeling), Your Daughter Nightshade, and Your Grandbuggy set about to get Selena, the Former Nightmare Moon, out of your head and in a body of her own. (And Sombra too if he's a good boy). But to do that, Artifacts from all over the world will be needed, plus a few from Another World.

Title Art Edited By TartarusFire, Original Art in Source.

Takes place in an alternate universe where Celestia and Luna used the Elements of Harmony to slay King Sombra.

Celestia and Luna are no more. The sun and moon have collided, and the heavens torn asunder in the aftermath of their final battle. The Elements of Harmony are missing, presumed forever lost. The fiends of Tartarus are on a rampage, and no one can stop them. And to make things perfect, the ruler of the nation of Boardor has decided to invade.
Desperate, Clover the Clever's last living student gathers together 108 virgin mares, in order to perform a ritual that will revive King Sombra. They succeed... kinda.
A human, in King Sombra's body, suddenly finds himself in an Equestria in a downward spiral with a bunch of technicolor ponies begging him to save them. Convinced that he's either dreaming, stoned, or insane, he tries to go along with it as best he can, although the voice in his head, a very angry voice with a hunger for conquest, crystals, slavery, and stairs, isn't doing much to instill confidence in his own sanity...

New Cover Art By Shadow Bolt!

While the 2nd Battle of Hoover Dam may feel like a conclusion to the story of New Vegas. For the Courier who fought at it and won it for Mr. House, it was merely another chapter in his already bloody story. Now armed with a prototype long ranged Transportalponder from Big MT, Houston finds himself in a world much different from his own.

One where you don't have to kill, lie and manipulate others to get by every day.
One where "friendship" is not a contract, but a given.
One where he is the Teacher to a world unscarred by the concept of war.

A world of...multi-colored Ponies?

Heavily inspired by the works of Rated Ponystar, ShoddyCast and numerous other MLP X Fallout stories.
Note that Courier Six's backstory derives from the Fallout New California mod.

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