Pincer is a changeling, a proud soldier of Queen Chrysalis. After the failed invasion of Canterlot, he finds himself trapped and at the mercy of Princess Celestia's Royal Guard. Believing that Celestia sees his species as nothing but soulless monsters, he prepares himself for the worst. The weeks crawl by, marked by an endless series of questions he will not answer for fear of endangering his friends and family at The Hive. As his nerves wear down and his interrogators learn just how ruthless he thinks they are, they have nothing to report but his belief that they will kill and destroy his kind without mercy.

Celestia steps in to prove him wrong, and what Pincer learns leaves him questioning everything he has ever known — but also gives him hope for what he'd never thought possible.

Cover art commissioned from http://www.demonkings.com.

Now with a TVTropes page.

Equestria is dead. The sun and moon have stopped, and the planet is in ruins. The xenos that built the civilization are gone, their works in ruins. Investigating the planet, Interrogator Kylara makes a surprising discovery, one that might hold the key to what happened to this once-fair land - and what might be done to stop it. A Warhammer 40k crossover.

Now featured on Canterlot's Finest and Equestria Daily

Also now featured on TV Tropes.

The Dragonborn, a legendary warrior capable of absorbing a slain Dragon's soul, and knowledge, directly, forever killing it. The Last Dragonborn had defeated the first, stopped the plans of a Vampire cult, and built his own lakeside home, before finally slaying Alduin the World Eater and fulfilling his fate. Now, after all the challenges he has faced, the Dragonborn is sent to a realm where Friendship is Magic, and there is no mead. Finally, to cap things off, he kind of... well...
Became a Dragon.

Ever had one of those days where everything's just gone wrong, one problem after another?

Of course you have.

Ever had one of those days when you wake up to find you've accidentally switched places with your counterpart in a world where you and all your friends are stallions?

...No?

Maybe that's just Twilight, then.

But the Princess of Magic isn't going to let a little thing like being in the wrong universe ruin her day. She has a schedule - a checklist! - and it matches up with this Dusk Shine's perfectly. Apart from the names and the genders, everything seems to be a match, and Ponyville has seen much weirder things since she moved here.

Being stallions or mares shouldn't make her friends that different. What could possibly go wrong?

The nation of Equestria has been exploring their little slice of the universe for some time now. From launching probes into deep space, to landing ponies on the moon. Sending things beyond the grasp of their planet has become almost routine. However, with every mission into space, there comes a time when the voyage must end. What happens when Equestria experiences the end of a voyage that they didn't begin?

Updated and Revised on October 5th, 2014

It had been nearly a year since you won that labor lottery. This job had quickly turned into the best thing that has ever happened to you and your family. From the Grestin checkpoint, you had seen it all; terrorist attacks, long-seperated lovers getting back together, people trying to smuggle drugs into the country...
None of that compares to the day a portal opens to an alternate dimension just outside the walls.
Which is bad, because inevitably that means more papers for you to check and double check.
But still, a job's a job. Might as well keep a straight face about it...
And remember:
Glory to Arstotzka.

You're 25, and a fan of My Little Pony: Friendship is Magic. And you have been granted the wish of every Brony that ever lived, you've been transported to the magical land of Equestria. Upon entering the beautiful world, you are taken to the princess' castle, where you are confronted by the two princesses, one of whom is more interested in you than the other.

This story is a sequel to Friday Night Twilight

A cartoon pony named Twilight Sparkle visits me every other Friday night. We talk more than we used to, but she still makes me watch that show of hers. Isn’t anything ever going to change?

Chinese Translation by ComradeSpark

Note: that Romance tag doesn't equate to mushy stuff, and it's not the reason for the Teen rating. This is much closer to Everyone than Mature.
Cover art generously provided once again by statoose
Big, heartfelt thanks to Skeeter The Lurker for helping me deal with reader reactions, and to Craine for proofreading the new final chapter.

When Sweetie Belle magically derails one of Twilight’s experiments, she finds that she and Rainbow Dash have switched bodies. While Twilight works on a way to remedy the situation, Rainbow and Sweetie try to live each other’s lives as if nothing has happened.

Which might have worked out, if the weather team hadn’t needed Rainbow’s help. Or if Diamond Tiara hadn’t decided to pick on Scootaloo.

Princess Celestia regrettably banishes Princess Luna to the moon for a thousand years. The princess of the sun laments over her sister's children, allows them to share in Luna's punishment, and curses her two closest followers.
Over the course of a thousand years, the ancient race of bat-ponies flourish in the secluded woods of Hollow Shades, developing their own culture and traditions.
Luna's banishment comes to an end. She goes to visit the bat-ponies in their forest, and discovers something amazing.

Coverart by http://silverkunai.tumblr.com/