Edit: Now a collaborative effort with Loyal2Luna

Commander Shepard has been through a lot, but now that the Reaper War's over he can finally relax and take a little R&R, right? Soak up the sun, grab a few drinks, spend some quality time with Tali, introduce a new race to the galaxy... wait, what?

In the aftermath of the war, a new species has been discovered amidst the destruction and fire. A species that have access to powers never seen before, powers which could prove vital to the continuation of galactic survival.

The Citadel Council has elected to send Shepard, along with the rest of the crew of the Normandy, to introduce Equestria to the universe outside of their solar system.

Now Shepard must wade through obstructive bureaucrats, antagonistic journalists, and the odd, angry prince in order to bring Equestria into a new age of space and adventure.

So settle in, it's going to be one hell of a vacation!

Now has it's own TvTropes page

There's more than one way to lead, and more than one way to be an Element of Magic. An AU looking at the effects of a slightly different early life for two unicorns.

So yes. This resulted from wondering what Trixie would be like as an Element of Magic. Given the choice, I decided to make her and Twilight childhood friends because of the potential for their entire life to be a gigantic Bokke and Tsukkomi routine (a comedian/straight man routine).

I also think that Trixie would do well as a combat mage. After all, she's genuinely powerful (if not so powerful as Twilight) and more importantly she's very good at misleading and bedazzling others. In fact, this entire thing began with my writing the fight scene with Nightmare Moon.

Finally, the Discording she had is based in part off what happened to her in the Pony POV series.

Hope this at least gave you the odd laugh.

Centuries ago, Clover the Clever recorded in her personal diary the events surrounding the origins and early lives of Celestia and Luna. Now, thanks to the princesses' gracious consent and the scholarship of Twilight Sparkle, this account may now be read by modern Equestrians.

After discovering that Cadence is not who she appears to be, Twilight is sent to another world entirely by the disguised Changeling Queen to avoid her plan being disrupted.
When Twilight lands, she discovers that not only have Spike, Owlowiscious and Peewee followed her, but that they've arrived in a world where the main sentient species is human.
There's still a place where they teach magic, though.
Crossover with Harry Potter. Twilight will be effectively taking the role of Hermione.

I've marked this story as cancelled to reflect the unlikelihood of it continuing. If I do come back to it I'll revert that.

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

Derpy Hooves is secretly a changeling.

Nopony particularly notices, or cares.

(New 9/15/19: Spanish translation by Spaniard Kiwi! Thank you!)

It's been uncounted millenia since the last of Twilight's first friends passed away. Even their names have passed into legend and myth, forgotten by the slow march of time. Now on a far away planet, she finds her musing upon all of her friends over the long years interrupted by her latest faithful student, Calming Waltz.

Now if she can only get that silly pony off to her wedding, and maybe teach her something about why her romance and wedding to come is so special and wonderous... Or at least something for Twilight to get a laugh out of, anyway.

This story is a sequel to Screwball Mio Amoré

Several months ago, a strange little propeller beanie dropped out of the sky and landed in an abandoned field outside Ponyville. The ponies went about their lives, blissfully unaware of what lurked underneath, until today...

It has taken a thousand years of hard work, but at last the four most powerful of the Star Beasts - Draco, Cetus, Cygnus, and Scorpio - have freed Princess Luna from her unfair imprisonment and millennial slumber upon the moon.

Now, she will have her revenge! ...after five more minutes of snoozing. Maybe a little more.

This is a re-telling of "Friendship is Magic" Parts I and II, from Nightmare Moon's perspective, and with minions, because all bad ponies need minions.

Rated T for language.

Raven of the Teen Titans has long been a closet pegasister. She was introduced to Friendship is Magic by Beast Boy and Starfire and - although she is loathe to admit it - she enjoyed it. She especially identified with the character of Twilight Sparkle. What with Twilight's enjoyment of reading, talent in magic, and unexpected but life changing friendships, it felt like Raven's own life mirrored and sugarcoated onto a world of pastel colored ponies. Even Twilight's friends reminded Raven of her own to a certain extent.
When she wakes up one morning in Twilight Sparkle's body with no idea how this happened or how to fix it, she begins to think she identified with her a little too well.
Now trapped in the plot of the series from the beginning, she has to find away to fix this, find out what happened to the real Twilight, and at the same time save all of Equestria. At least she has some friends to help, right?

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Crossover idea inspired by the fact that these two characters share the same voice actor, Tara Strong. Originally, it was just an idea I played with for fun, but I have a serious - and frightening - plot for it. Dark for later chapters.