Once upon a time, in the magical land of Equestria...

One week ago, Twilight Sparkle was crowned the fourth Princess of Equestria. Tonight, Ponyville hosts the 1003rd Summer Sun Celebration, and Princess Celestia and Princess Luna want a vacation. With two fine young princesses like Cadance and Twilight to take over for them, nothing could possibly go wrong.

(Title image hacked together from vectors by sakatagintoki117 and Chrome-MMVII.)

Princess Celestia was sure that the day was going to be great. The Sun shone bright in the sky, the birds were singing, and nothing could possibly go wrong. That was, until she received some rather grim news concerning her sister.

She thought she'd been clear enough about things last time.

Polish translation by Dolar84.
Spanish translation by SPANIARD KIWI.
Audio reading by Pony&Wolf Productions.

What's the deal with ponies? Squint just a little and you can't tell one from the next.
Ember doesn't even need to squint to get the effect.
Who would have guessed that a Dragonlord would have problems that needed more than just an application of violence?

After the defeat of Tirek, Equestria is safe once more, but Luna can sense that her sister is troubled. When Celestia retreats to the starry realm of ascension in order to look upon the past, Luna joins her to discover what is bothering her.

There is now a Spanish translation of this story, courtesy of Spaniard Kiwi

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

Minuette has an imaginary friend. At least, that's what everypony else thinks.

When ten-year-old magic student Minuette comes into possession of an antique vanity mirror, she is surprised to discover there is a creature living inside: A bug pony with big fangs and glowing eyes. Most little foals would probably be scared of such a creature, but not Minuette. Armed with a cheerful smile, she decides to befriend the bug in her mirror and uncover the mystery behind his bewildering predicament.

It's just such a shame that nopony else can see him.

First Act Edited by Mister Hypothetical

Second act and on edited by Xanni & Brony2005

This story is part of 'The Bugs in Strange Places' series, whose other entries include The Bug in The Herd, The Bug in The Basement, and The Bug in The Cave. You do not need to read any of these previous stories to enjoy this one, as they are not directly connected.

Inspiration for this story comes directly from this fine individual right here.

This story is a sequel to Best Hell Ever

Once upon a time, Twilight went to hell. It wasn’t that bad. It was pretty great, actually. It had a library! A big one. Like, bigger-than-the-universe big. But then Twilight went and got herself kicked out of hell, and now she’s depressed.

There’s only one logical solution: with Starlight’s reluctant help, Twilight is going to break into hell and invade its library. Oh, it’ll be tricky — trying to find one specific location in an infinite dimension tends to be a bit hard — but the infinite knowledge it’ll provide is too good to pass up. Twilight will find that library if it kills her (which, since this is hell, isn’t the worst thing ever in the grand scheme of things).

There is absolutely no way this can possibly go wrong.

This story is a sequel to Petriculture

It's been several months since Pinkie Pie made a stunning admission about her past that permanently changed her relationship with her friends, particularly Twilight Sparkle, but life seems to have settled back to normal (well, normal by Pinkie Pie's standards, at least). However, when an old nemesis returns and ensnares Twilight in her influence, it's up to Pinkie to make things right.

This is the second story in The Petriculture Cycle. There is a TV Tropes Page for the entire Cycle here.

Cover image by Page Turner; "Princess Twilight" vector by Nianara.

Today is Princess Twilight Sparkle’s 500th birthday, and her most faithful student, an earth pony with a familiar name, can’t wait to celebrate!

Notes:
- Cover art by ErinKarsath, used with permission. Check out her DeviantArt page.
- This is a story in the Birthdayverse, and you can find the sequel here.
- Many thanks to my faithful Pre-Reader and all around super-duper best pony, Blood Lord. Go read his story, too!
- This was written during the season 3 hiatus of MLP:FiM.

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)