Just how different are mares and stallions in approaching friendship problems?

Twilight and Spike intend to find out, and it seems like the perfect excuse to jump into an alternate universe. Specifically, one where everypony was born the opposite gender.

Princess Celestia doesn't like how humans deal with their problems, so she decides to do something about it. That something is an invasion attempt. She starts in what appears to be an old, abandoned town but soon learns this is the home of 2 deadly and ruthless human groups.

It has been one of the closest guarded secrets of Canterlot's royalty. Deep in a specially constructed dungeon, surrounded by warding spells and powerful magic barriers, exists an enigma. Within a cage that could only be described as something out of a nightmare, it waits and watches all of Equestria. A creature that cannot age, is immune to disease, does not thirst nor hunger, and resists all injury. But, it also holds secrets and knowledge that could safeguard the kingdom. Its powers are frightening, but it is civil enough for debate when patience permits.

Princess Celestia has sought counsel with the creature before, enduring it making deal after deal for its services. The Princess walks a fine line when dealing with it, knowing full well anything could give it an advantage despite its imprisonment. She has had to go back on her word in these dealings, and from this a deep animosity between them has been born. It is a necessary evil as she is convinced this is a being capable of untold evil far and above anything Equestria has ever dreamed of. So long as it remains within the confines of its cell, her kingdom is made safe. So much magic has been woven to ensure that, there is little chance of escape.

So long as the magic holds, there is no danger. So long as the cage remains strong, the nameless creature stays enthralled in his cavernous dwelling. If that were to change--if the magic failed--not even the wisest could say. But one thing is assured, it does not bode well for Equestria.

Following his tumultuous defeat, King Sombra is flung across space and time to exit out a human's malfunctioning toaster. For weeks, Sombra monologues his revenge to destroy those that hurt him. But seven months later, when a route back to Equestria is found, does he not seem all that interested in returning.

Edited by spigo.

Prequel: The Roommate From Tartarus
Side Sequel: (Not My) Home Sweet Home

Update: labelled as complete. The last three chapters will remain as bonus chapters.

Celestia has a dangerous creature held in the deepest of Canterlot's high-security dungeons. It can create ponies (with full backgrounds and histories) with it's strange and often-times prophetic powers. The Princess does her best to keep it under wraps, but its only a matter of time before it's "creativity" will get out of control.

Equestria is still picking up the pieces after the defeat of Tirek, and everypony is helping out with the paperwork, even Rainbow Dash. Things change when Princess Celestia arrives, bringing with her a letter with some very stunning accusations of the exploits of a resident in the town of Oasis. Now, the main six are tasked with finding out if the letter was truth or fiction. Did this Mister Baker really do what they claim? Only one way to find out.

However, Mister Baker is not who, or what they expected.

Rated Teen for occasional language. Additional tags added for more dark themes.

Proof read and edited by the amazing SunnyPack , Snakeskin Ducktape, and Tyrannosaurus Tux.

I am now Princess Luna, and it’s not as fun as you might think. I don’t know what’s going on, how I got here, or what I’m going to do. Princess Celestia thinks I’m crazy, that I’ve lost my mind…

But something tells me I’m stuck here… so one way or another, I’m going to have to get used to this new life. Now if only I could figure out this stupid Magic stuff...

Story by Pinklestia with the collaboration of Rainbow Sparkle for the first three chapters.

The ponies of Ponyville grew fearful of a being that lived among them. Wielding the weapons of his people, will they finally band together and claim victory over him once and for all? Or be shot down in defeat?

Being the Royal Advisor for Celestia and Luna, you've come up with solutions for many of the nation's problems.

Unfortunately you said a naughty word in front of a guard. Seeing as how these ponies are extremely sensitive, you lie your way out of it.

The events that follow could only be described as "completely stupid".

Rated Teen for naughty words being said.

Thanks to Zephyr for editing.

Featured within 1 hour and 30 minutes on Aug 12, 2015. Thank you guys so much!

Good thing I was reading this on the toilet, because this story made me lose my shit. -LeoneHaxor

Daniel Habbuck, UN ambassador to Equestria, hates his job.

Sure it pays well, but it's hardly worth having to put up with flank-kissing politicians and the stomach twisting anxiety of knowing that he represents all of humanity.
One night, after a particularly tense meeting leaves him wound up, Daniel is desperate for somepony to talk to. With his friends either busy or too far away, he hires a batpony prostitute, just so he can have some company.

As he soon learns, there's much more to this streetwalker than meets the eye...

Rated T for sexual references, but no clop.

Special thanks to WingmanRed, Georg, and Kraken Hatchling for proofreading and editing

EDIT: Special, special thanks to Comrade Pony for the suggestions
EDIT: Deleted cover art.