“Polyamory.”

Rainbow Dash blinked at Rarity. “Come again?”

“Polyamory. What you’re trying to build with Pinkie Pie and Fluttershy is called a polyamorous relationship."

“Okay,” said Rainbow Dash, “fine. So I know what it’s called. But what I really need to know is how I’m going to make it work!”

Featured on the Pony Fiction Vault, 05/11/12!
Sequel

There are stories which define us. Stories that inspire us. And there are stories that damn us.

These are the Old Stories, tales from before the dawn of Equestria.

Spanish translation

The original EqD link is here: http://www.equestriadaily.com/2011/08/story-old-stories.html

When Twilight receives one of the original journals of Starswirl the Bearded from Princess Luna, she can't wait to try the spells inside it, but the book's magic turns out to be a bit more than Twilight can handle, as her reckless experimentation leads to her accidentally bringing her reflection to life. At first, Twilight decides she quite likes the idea of having a copy around the library. But seeing herself from an outside perspective makes Twilight realize there are some parts of her personality she doesn't care for, forcing her to confront her issues.

Written in the same format as the show, save that it is longer and addresses somewhat sadder themes. No objectionable content or OC characters, focuses heavily on the mane cast.

Special thanks goes out to Pascoite and PavFeira, the two editors who somehow managed to withstand my childish scribbling long enough to make them readable. Couldn't have done it without you!

Greater things are often found through the smallest of interests.

Twilight Sparkle is a gifted student and scholar. When she attempts to harness her creative side by writing a science-themed sensual romance novel, however, things rapidly get out of hoof. Can her friends stage an intervention before she humiliates herself (and them) at a prestigious literature recital?

No. No, they cannot.

[Comedy] [Parody] On June 28, 2011, Michael Bay released Transformers: Dark of the Moon, his third feature film based on the HASBRO toy line Transformers. The next day, Bay and HASBRO entered into talks over another of the toy company’s properties, My Little Pony: Friendship is Magic. The only concrete evidence of the new film to emerge so far is a tattered screenplay, presented here, which was found in a dumpster outside Bay’s production house, Platinum Dunes.

It is the longest day of the year, and something has gone wrong. Canterlot is in ruins, Celestia is an out-of-control god flying west, and it's up to Twilight Sparkle and her friends to save Equestria. But with the Great and Powerful Trixie playing a reckless wild card, do the girls have what it takes to set things right?

[Comedy] The Cutie Mark Crusaders have finally gone too far, and Twilight Sparkle & Friends decide it's time to teach them a lesson. But when their prank starts to take on a life of its own, they may end up being too clever for their own good.

Roseluck doesn't like to admit her crush to most ponies; the few she's told were too busy laughing to hear her explain herself. She's ready to give up on the notion of confessing her love, until the town jeweler offers his encouragement and even his assistance in helping her secure her "special somepony". Would he have been so enthusiastic in helping if he knew the "special somepony" is a "special somegriffon", she wonders?

UPDATE 03/31/13: This story is not dead. My current plan is to do one last minor revision to these chapters, then finish and publish Chapter 3. I know that there are a lot of people waiting for more of this story, and my last intent is to disappoint them. I will try my hardest to make it worth the wait.

Credit (and lots of thanks) where they are due:

Exuno: Editor
Lung and LyRarity: Pre-readers
Hawkysu: Kind words and support