This story is a sequel to How Not To Use Your Royal Prerogative

  In an Equestria where the Sonic Rainboom never happened, Sunset Shimmer is the prized pupil of the Princess of the Sun. As Sunset struggles to make up for her past misdeeds and come to terms with the pony she wants to be, Celestia sends her to find the classic work The Application of Unified Harmony Magic from the Royal Canterlot Archives.
  Right after lunch, some meddling by her friends and meeting somepony with firsthoof experience of the Sunset she used to be.

Featured on Equestria Daily on August 18, 2016!
Appeared in the FimFiction Featured Box!

Cast: Sunset Shimmer, Moon Dancer, Minuette, Twilight Sparkle & Princess Celestia

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Credits
Cover Design by Amber Spark
Sunset Shimmer Vector by TigerBeetle
Pony SciTwi Vector by Osipush
Canterlot Bookshelves Vector by FavoriteArtMan
Sunset Shimmer Cutie Mark by MillennialDan

Beta Reader Credits
Ebon Quill - Worldbuilding Writer on The Manehattan Project
Quantum State - Technical Director of The Manehattan Project
The Albinocorn - Master of Sunset Shimmer Stories

Strongly Recommended Stories:
The Brightest and the Best by Pineta - The events in this story are considered to be completely canon to this timeline and explain Twilight's entrance exam to Celestia's School for Gifted Unicorns. I cannot recommend this story enough.
MLP Annual 2013 - "The Fall of Sunset Shimmer" - As above, the 8-page short comic in the beginning of the Annual is also considered to be canon, though with some major variations.

Version 3.0 Edit: Extensive grammatical and mechanics changes. Adjustment to timeline of Sunset's second mirror experience.

Sunset's friends ask her for help with a lot of things. Pretending to be Rarity's boyfriend at her cousin's wedding is a new one. It can't be that hard, right? A sharp suit, some expertly applied makeup, and a good backstory and she'll be charming the pants off of the bridesmaids in no time.

But just what is Rarity hoping to get out of this subterfuge in the first place?

Russian translation

MLP/Undertale crossover.
Not a PWNY-verse story.

Long ago, the Monsters and Humans fought a great war. The Monsters lost, and were sealed in the Underground. It would take the power of seven human souls to break the barrier that kept them imprisoned. They only had six. And so the Monsters waited and hoped, praying that another human would find their way to the Underground. Some thought the seventh soul would give their King the strength to break the barrier. Some dreamed of a human who would be their friend, and save them all...or had nightmares of one who would bring back the war.

...but nobody came.

...but somepony did.

Eons after the war, with no way to tell how much time had passed above, a tiny blue filly with wings and horn fell into the underground, calling for her Mama. None knew the poor creature's nature or origins...but her soul was powerful with magic, even more so than a human soul.

None can know what will come...of this little 'Woona'.

Cover art by Sanyo21

Almost a year after what seemed to be the concluding battle in Celestia's great crusade against necromancers, something Mortem believes to be borderline discrimination, he discovers one of Celestia's armies setting up camp just outside his stronghold.

Not wanting to jump to any conclusions or risk angering the very powerful Princess, he concludes a diplomatic solution would be the best way forward. And so, he writes a letter.

Proofread by the wonderful Soren Mercer
Featured on Equestria Daily here
Audiobook versions by Illya Leonov and TheArchitect are here and here respectively
SoundCloud verion of Illya Leonov's is here

One day a man wakes up in a pony's bed. For the next several days the two of them try to discover why such a thing happened.

They don't do a very good job of figuring anything out but they do cuddle a lot.

Sometimes your passions are at odds with one another. In some cases, they're so at odds with one another that you need to hide behind a different name just to be yourself. Living two lives is hard, and in the case of Photo Finish and Rainbow Dash, it's about to get harder.

Rated Teen for mild cursing, alcohol, and mild adult themes.

Thanks to my good friend Falkon for edits, MelodicMarzipan for the awesome cover art, and everyone who has pestered me to work on this story since I had the idea back during Season 2

Hey look, someone reviewed my story!

No one ever wants to fight for the Rebels during reenactments of battles from the Equestrian Civil War; they're the bad guys, and they always lose. When Spike is placed on the Rebel side yet again so that Twilight can continue to win, he enlists the help of Starlight Glimmer and several thousand other ponies in launching a protracted reenactment conflict which will finally allow him to prove his worth and triumph over Twilight and the rest of his friends. This story is complete with enough Civil War humor to make Fredricksburg look like Sharpsburg.

A soft Teen rating for tobacco/alcohol use.

Inspired by a wallpaper commission I got from the very talented mourning-dreams (mourning-dreams.deviantart.com).

UPDATE: Featured on front page of Fimfiction, 5/19/16! Thank you all so much!
UPDATE: 3k+ Views! Thanks so much, and remember to check out the sequel, General George S. Dragon!

After a discussion in class, Twilight has a very important question to ask her mentor Princess Celestia.

Pre read by ZOMG, Jumbled Thought, Cerulean Voice and Zodiac.
Edited by Dont Look At My Name Bro

The human artist named Alice arrives in Equestria through somewhat odd means. Upon arrival she finds that she can't speak or read Equestrian. Because of this the girl has to find some other way to communicate, and if not through words then through emotion instead.

After being abandoned by her friends during christmas, Sunset Shimmer wanders the cold streets of town, alone, and with nowhere to go. After walking for hours, she eventually gives into the elements around her, only to be saved at the last second by the last ones she ever thought would help her.

Meanwhile, the truth about Anon-A-Miss has come out, and her five friends are desperately trying to find her so they can apologize for what they have done.