“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

Equestria is a land of magic and harmony, a peaceful realm ruled by immortal and benevolent monarchs. At what cost is this possible?

Following the discovery of a strange and powerful device, Twilight Sparkle is whisked away to the edges of a land she thought she knew so well. Here, surrounded by ponies whose very existences have been kept secret, she must contend with vicious enemies, hostile allies, and the truth.

Chapters 1-16 edited by KiltedKey

Many years after sending her beloved protege to Ponyville, unease sits heavily on Princess Celestia's heart as her relationship with Twilight Sparkle seems to have cooled despite all they've accomplished together. On the advice of her sister, Celestia sets out to investigate and resolve the lost connection with her most faithful student. What does it mean to be a Faithful Student...or a Princess of the Sun?

Earned a six-star rating on Equestria Daily and featured on its very own TVTropes page!.

This story is a sequel to Off The Edge Of The Map

When Twilight is sent with Luna on a diplomatic mission to Draconia, they quickly find themselves somewhere that doesn't appear on any map, and Luna is lost in more than one way...

Thanks to RBDash47 of Pony Fiction Archive for formatting it for submission.
Title image by Valcron

Tremendous thanks to Illya Leonov and Scribbler for the Audiobook version.
Now with a Spanssh translation by SPANIARD KIWI: https://www.deviantart.com/spaniard-kiwi/art/Apoteosis-2-3-857110089

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.

When Rainbow Dash's newest trick backfires spectacularly, she and Fluttershy find themselves stranded in the middle of nowhere. Together, they'll have to survive and find their way back to Equestria and Ponyville...no matter how far the journey.

Now with a Spanish translation by SPANIARD KIWI: https://www.deviantart.com/spaniard-kiwi/art/Apoteosis-1-3-857109863

(Originally submitted to Equestria Daily)
Art by katwalk.

Applejack and Rarity must deal with each other for an entire week as the cowpony mends after an incident. Applejack just wants to get home as fast as possible, but after spending time with the brash pony, Rarity finds herself questioning her feelings for Ponyville's prized pony.

Shipfic involving Rarity and Applejack by request. I really need to stop sending ponies to the hospital in these things.
Hopefully you enjoy it nonetheless and know that this is as dramatic as it should get for the remainder of the story.
Picture is a screencap from Look before you sleep.

Octavia isn't the type of mare to mix up with suspicious crowds. She stays away from ponies who are different from herself, never giving them second thought, never considering the fact that they might be friendly.
But what happens if Octavia doesn't have a choice? What if she needs one of these uncouth ponies she so despises, and avoids at all costs? And mostly, what will her family say if she goes as far as to fall in love with one?

Rated teen for some minor sexual themes

This beautiful new cover pic is by the great and powerful (in my opinion) RainbowShy1241. A big huge thanks to you, because it's awesome!

Octavia is pointed in the direction of Carousel Boutique by a respected colleague. She intends to commision matching uniforms on behalf of her ensemble leader, the esteemed Frederic Horseshoepin. Octavia has misgivings however, when informed that the boutique in question is in Ponyville, a backwater farming town.

Can the proprietor of Carousel Boutique prove to the Canterlot mare that she has what it takes?

When the Cake's go away for a weekend trip, leaving Pinkie home, Rarity steps in to offer her pink friend a place to stay for a few days so she won't be alone. With the two stuck under a roof together and Rarity slowly seeing a side of her friend she never knew existed, will romance blossom or will friendships crumble?

Now has a part two in the making, check out 'Weekdays are too short' in my stories to see the continuation.
Special thanks to HabitualHyperbole for editing the chapters.