Can Equestria handle the impact caused by Wild Pony, who is actually the somewhat scrambled and ponified martial arts prodigy and weirdness magnet otherwise known as Ranma Saotome?

Set after the failed wedding at the end of Ranma ½ and approximately three years before the return of Nightmare Moon, then rapidly skips ahead to just a few months prior.

Now has a side story: My Little Sphinx

On a side note, like MLP:FiM itself, the story will mainly be Slice of Life, with the occasional sections of Action/Adventure popping up now and then. I mention this because I couldn't choose both tags, and of the two, this story weighs in more on the Slice of Life side.

Vaati the Wind Mage has grown bored with the whole villain thing. He's trapped himself in a cycle doomed to repeat itself forever. Seeking a way to escape this miserable cycle of escape, kidnapping, and defeat, the legendary sorcerer inadvertantly teleports himself to another world entirely; a world populated by talking magical ponies who believe friendship is magic. Just how will the former villain survive this sugar bowl of a world? Will he end up learning a few lessons in friendship himself? One thing's for sure, retirement has never been this exciting.

AUTHOR NOTE: This story takes place in an episodic format. That is, it follows the style of the show in that every chapter is an 'episode', hence why they will all be lengthy. Some episodes will be canon ones with Vaati along for the ride, and others will be original where Vaati takes center-stage. The first episode takes place shortly after 'Griffon the Brush-Off'. Vaati is from Legend of Zelda and is property of Nintendo. You already know who owns 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!)

We all know the story of how the Princess’ young student and five friends defeated Nightmare Moon and brought Princess Luna back to our lands. But what if the tale were false? What if the young Twilight Sparkle on the event of her entrance exam had not been rescued by Princess Celestia, but instead lost her mind among the power of her youthful surge and had to be sent away, far away before she could destroy all of Canterlot with her newfound power. Now the feral unicorn prowling the Everfree Forest only vaguely remembers her past, slipping away from constant terrifying attempts to capture her.

And she is beginning to remember what true power felt like.

Editors include: Peter, Justin, Featherprop, Mitch H, and Bad Horse
Featured on Equestria Daily
Reviewed by Chris on One Man's Pony Ramblings and by Paul Asaran on his review blog
Now with a TV Tropes page

Physical books are available on Lulu.com
Monster in the Twilight (Paperback) 272 pages
Monster in the Twilight (Hardback)