Inspired by the story image, RainbowDoubleDash's Lunaverse and Trinary's "Rainbooms and Royalty", I give you my take on the alternate universe concept. Namely, a universe where Spike is the pony and Twilight is his dragon assistant.

The thousandth Summer Sun Celebration is approaching. With it will come the return of Nightmare Moon. Celestia has no student to call upon to save Equestria, and is doing all she can to make the last day of peace meaningful for her people.

Meanwhile, Spike "Purple Prose" Flail is a reporter for the Canterlot Sun. He finds himself being shipped down to the boonies with his longtime friend and assistant, Twilight, to cover the biggest festival Equestria has seen in a millennium!

But even with a visit from the princess, there's no way someplace as boring as Ponyville could ever be newsworthy. Right?

A/N: Credit for cover image goes to dzetaWMDunion on Deviantart art.

Story would also include character tags for Thunderlane and Cheerilee if not for the character tag limit.

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In a world much like we know, another family has the throne. Applejack, crowned Princess of Equestria, is having a really bad day, and it isn't helped when every single member of the Apple Family happens to be an Alicorn.

An entry for Slippy's Royalty Collab.

This story is a sequel to Random Elements

Pinkamena, Captain Fluttershy, Sparks, Rock, Applejack and the Awesome and Stupendous Rainbow Dash are back home again after their time in the other Equestria where the sun still shined.

Now all they've got to do is to use the Elements of Harmony on Nightmare Moon in Canterlot to end the eternal night.

With such a simple plan absolutely nothing could possibly go wrong.

~~~

Sequel to my first story Random Elements which you really should read first or none of this is going to make much sense.

Courtesy of another equally awesome brony Coincidences can Happen now shares the Random Elements tropes page.

(Cover art was made by me based off the Fluttershy vector used in the Bridlemaids poster)

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)

An alternate universe story, in which Twilight Sparkle was born a pegasus, not a unicorn. Because of this, she isn't Princess Celestia's personal student at the School for Gifted Unicorns, and she can't wield the Element of Magic. Can she still help save the world from Nightmare Moon? Or will she fall under the dark powers of nightmares?

This was somewhat inspired by Rainbooms and Royalty, a story in which Princess Celestia picks Rainbow Dash to be her personal student.

Octavia Philharmonica would like nothing more than to practice her cello and to compose beautiful music all by herself. Unfortunately, her teacher Princess Cadance has other plans! Sent to Ponyville to assist with logistics for the Vernal Equinox Festival, Octavia wants only to get through the ceremony with as little interaction with the local populace as possible, but her plans are derailed by the return of two ancient evils. When the ancient tyrants Burning Sun and Nightmare Moon break free from their prisons and initiate a new era of war and devastation, Octavia finds herself and five other musicians -- Vinyl Scratch, Fluttershy, Lyra Heartstrings, Bluenote, and Medley -- caught up in a desperate race to find the Elements of Harmony and stop the alicorns. It will be a difficult journey, but it just might be possible, if Octavia can manage to befriend the other ponies... and if she can learn to truly listen to the music of Ponyville.

First story in the Cadanceverse!

Cover art generously provided by Mimicry.

Special thanks to my betas Blackbelt, Lev the Lurker, and RK_Striker_JK_5

Cynical noble who hates everything.
Royal guard with big potential and a lot to learn.
Big, simple farmer with heart of gold.
Crazy self proclaimed time traveler.
Hotblooded, always second weather manager.
Expert lover and clumsy celebrity flier.

These six stallions will have to band together and discover true power of Elements of Harmony and Friendship to save Equestria from everlasting night.
***
New NEW cover art provided by ScarletCommenter.

Now has a TV Tropes page!

Twilight Sparkle, becoming anxious at the upcoming Summer Sun Celebration, which she believes marks the return of Nightmare Moon, beseeches Princess Celestia to do something about it.

Celestia, however, has another, more important task for her; making sure that the Summer Sun Celebration goes off without a hitch. Every year, a different town is chosen to receive the honor of hosting the grand festival.

And the lucky city chosen this year, for this fateful holiday, is none other than the city of Manehattan...

Cover image by Conner Cogwork.

This follows the events described in the Cutie Mark Chronicles, with one small change: The Sonic Rainboom doesn't happen like it was supposed to. Six destinies fail to start. But when one door closes, another one opens.

Cover Art by Inspired_Light

This is supposed to be close to Canon, but since history is altered and the characters don't experience many of the events that make them who they are in the show I'm listing this as alternate universe (does that make sense?)
For the same reason I'm listing the OC tag, even though the OCs are the mane 6 living different lives.

Nopony dies, nopony suffers permanent psychological scarring, and no irrational whirlwind romances happen.
If I have inadvertently included somepony's OC I apologize.

Warning: contents may contain Existentialism. The facility used also handles peanut based products and wheat gluten.

In a world where the Sonic Rainboom never occurred and tied the Mane 6 together, they found themselves taking drastically different paths in life. Nevertheless, they still managed to find one another and stand together when Equestria needed them most.

It's now several months after the Elements of Harmony chose their new bearers, and the citizens of Ponyville are about to take part in Winter Wrap-Up. Their plans are soon disrupted, however, by an ancient, unknown enemy with a desire to seize the Elements and an icy hatred for Celestia and Luna!

(This is an Alternate Universe fic, and the characterizations for the altered Mane 6 were inspired by defender2222)

Takes place before: Lunar Eclipse: The Rock Opera