Princess Celestia: Goddess of the Sun, ruler of Equestria, beloved Princess of ponies. She is loved by all, and loves all in return. A calm and wise ruler, she sits on the throne in Canterlot, maintaining peace and harmony throughout the land.

What most don't know is that her past is much darker: She was once a commander of legions, a warrior and scientist of unmatched skill. Thousands of monsters and abominations fell to her forces, slain in the name of an old leader, one entombed within his own throne. Free of her old form, free of the powers of Chaos, she was cast into a new realm, in a new form, with a new lease on life.

She is the God Emperor, Eternal Ruler of Equestria and Lord of the Imperium of Man.

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Comments contain spoilers. YOU HAVE BEEN WARNED!!!

Celestia finds herself sharing company and her booze stash with Luna's crazed split-personality, Nightmare-Moon. However, as the night wears on, she finds she may actually be able to tolerate the dark alicorn. Maybe even like her.

For Nightmare Moon is the best pony: Contest numero uno.

The storm is breaking on the Horizon.

It's been two months since the battle against Nightmare Moon. Luna is recovering, Celestia is busy turning the government back into a diarchy, and the Mane Six have returned to their lives. All seems well, but when Celestia discovers that half of the power of the Elements of Harmony have been transferred to each of the Bearers, she decides to send thirteen mysterious members of the Royal Guard to monitor them as they manifest and develop their new abilities.

The sins of a forgotten war still linger, and an ancient evil lurks in the shadows, just waiting for the right time to strike. The Mane Six suddenly find themselves once again at the heart of a conspiracy to bring about Eternal Night, and only by awakening their powers and realizing their full potential can they do anything to stop it. Friends both old and new will help them along the way, and an unseen force will guide them as it seeks to right a wrong made thousands of years ago. The Bearer's journeys will take them outside the borders of Equestria and into the world beyond, and when they return, they'll have the power and experience necessary to save the world and bring about balance in all things.

The Powers of Harmony TV Tropes Page (SPOILERS)
The Powers of Harmony Art

Thanks to Wildy71090 for the cover pic.

Set shortly after the Nightmare Rarity arc in the comics.
Nightmare moon believes Twilight is responsible for both of her defeats and has decided to take care of the root of the problem. With the last of her strength she enters Twilight's dreams to claim her revenge.

Now Rated Teen because I kind of kill them on a regular basis, but they're immortal so they get better.

The continuing story of those in Canterlot Castle and the surrounding areas. With four immature gods running about, is anybody going to survive? Probably. However, with each day, the madness in Equestria grows and sadly I don't think anyone actually cares anymore.

It's time for Equestria's Crazies; a tale of love, of tasers, comedy and finally me, tormenting as many ponies as possible before I get bored.

[Head's up, this story is an Episodic series. Each chapter is it's own contained "Story" but really it's just whatever I want to happen on that particular day.]

The tale of the Imprisoned Sister has been told and retold for centuries, but no Little Pony knows of it as it unfolded in realms far and above. What is the moon to do when her mother and guide loses her way?

I was set on having a day filled with playing games and chatting to some online friends. That was I DID until I woke up in the body of a particular pony. Her name: Nightmare Moon. Well there goes my masculinity, along with my life. Need I say more? Oh yeah, ROAD TRIP!! Teen for language.

For the PonyEarthverse.

This story is a sequel to Celestia's Tiny Student

(Title changed from "Ponyville's Tiny Librarian" for reason pointed in this blog )

Twilight Sparkle is a one-kilogram pony the size of a large rat, shrunken by Princess Celestia following her entrance exam to the Celestia’s School for Gifted Unicorns to ensure that her power surges would not pose a danger to the ponies around her.

She’s spent thirteen years full of hard training at her new size, facing the life-threatening experiences that came with living in a world of giants. To survive those thirteen years of hardship and joy, of learning and adventure, and of pride and humility, Twilight has challenged herself to be stronger, to overcome any obstacle.

Now that tiny Twilight is on her way to Ponyville to oversee the preparations for the Summer Sun Celebration, how well will this miniature mare fare outside of the confines of the castle? How will the other Element Bearers react to her? How will Nightmare Moon react to the tiny unicorn? Is Twiny prepared to face Ponyville, and, more importantly, is Ponyville prepared to face her?

Credits:
Art cover - kc day

Top editors: (editing and rewritting for months, hope quality is to your liking).
Kydois
Georg

Nightmare Moon's sentences editor:
Bahatumay

Applejack accent editor:
Crimson Star (Chapter 1 - Applejack)
Rebel Brony
The Notebook is grounded

Pinkie sentence's editor:
Plump it UP

Other editors:
Hereward
tana1100
Lab (small editing from prologue to chapter 4)

Pre-reader:
Rated Ponystar

To celebrate the release of this sequel, I created a group called “Twinyverse” for all fans of this story where you can talk about it and track all side stories with ease.
The Twinyverse Group

Nightmare Moon has won, and the world has been shrouded in eternal night. But hope still lives. The land of Equestria is currently divided between the armies of the usurper and those of the Dawn Militia. However, the greatest danger to the rebellion may not be the dreaded Mare of the Moon, but her lieutenant, Eclipse–formerly known as Twilight Sparkle.

The Summer Sun Celebration has gone off without a hitch, leaving Twilight embarrassed and confused. She is sent to remain in Ponyville to learn about friendship, the most powerful magic ever. However this task is interrupted by an unwanted guest. Not only is Twilight forced to put up with her new houseguest, she's starting to feel a change coming over her, taking over her mind. Can she resist the call of the night, or will she fall entirely into the grasp of Nightmare Moon?