This story is a sequel to Harmony of Chaos

Shadow leaves Mobius for Equestria after Discord's defeat, hoping to make a fresh start. However, his friendship with Twilight develops until it becomes stronger than he'd anticipated, and leads him to a future he'd never dreamed possible.
However, while Shadow's life takes on fairy tale proportions, Twilight is faced with diffivult emotional hurdles...ones that she will never escape.

Rainbow Dash has always wanted to be a Wonderbolt, but all she's ever seen has been the glory of it, never understanding what it truely meant beyond the best of the best. However, someone she's long looked up to is going to reveal truths she will need to know to make an important decision...all the while holding back something even more important.

Celestia is beginning to get into her Princess Duties under her mother and father. This is taking up a great deal of her time. Her baby sister, Luna, is not happy about this, as it feels that nopony has time for her. To appease her, Celestia sets out to find fillies Luna's age for her to play with, and to teach her the Magic of Friendship. She then discovers how hard it is to balance foalsitting 7 fillies still in diapers with growing up as royalty.

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A challenge to myself. The exact nature of the challenge is unimportant. However, take a look at this.

HNNNG Counter:
0178++++++

Edit: The '+' equals a HNNG that encompasses the entire chapter.

That's right. When you comment, I'd like you to include how many times in each chapter you have that particular reaction. I'll be keeping a running total. That ought to give you a good idea what kind of story this is.

A continuation done with permission of a story by a friend on DA.
Read his story first or a good part of this won't make sense. The two parts can be found on DA.
http://fav.me/d5ubc08
http://fav.me/d5vngyg

Luna once more goes to be with the spirit of Jetfire, the love of her life from before her time as Nightmare Moon. He helps her to adjust to a world that still has yet to fully accept her, and brings her joy she ahd never known before. However, this joy also leaves her with an unexpected gift, one she won't know how to handle...and it leaves Celestia with a bit of a problem.
For one thing, the spell Luna's been using to spend time with Jetfire is a state secret for a very good reason. Meddling with the boundary between life and death is dangerous.
For another, Luan has been quite focal in her lack of interest in any stallions - or mares - of the present era, saying she will never love again.
So how is Celestia supposed to explain this?

Jetfire belongs to Irft4san on DeviantArt. The spell was also his creation. This plotline is mine. MLP:FiM belongs to Hasbro. Don't sue me.

Twilight begins to learn more about her alicorn nature, and winds up discovering something about Rainbow Dash and Fluttershy that catches her off guard.
Rainbow Dash and Fluttershy have always been especially close. Few ponies can come up with a reasonable explanation for this. On the outside, it would be hard to imagine them being any more different.
However, on the inside, they couldn't be more alike.
They've always been the perfect match. Always.

When Twilight is called back to Canterlot to see to certain serious Princess duties, her friends seriously miss her. However, Rainbow has conflicted feelings, due to something that she thinks happened the night before her departure. So, when Twilight summons her - and her alone - to Canterlot, with instructions not to tell her other friends, she doesn't know what to expect. Certainly not being sent on a mission of national security with the fate of two worlds at stake, which becomes the start of an adventure of a lifetime.

One thing's for sure. That's the last time she agrees to one of Applejack's drinking games.

Spike has long been confused about his past. He remembers a father and sister that no one else does, ones that don't fully make sense. He remembers the demon that killed him...but then he was not dead. He can't remember what happened next.

Now, what begins as a journey to help his oldest friend clear his name turns into an epic quest to save the world. As he journeys, he will discover the truth about himself, his past, and the world around him. New friends will aid him, and an ancient power will awaken. A great evil stirs deep beneath the surface, and it is his destiny to face it. But he will not face it alone.

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Crossover with Breath of Fire 2. An idea I had that seemed to fit, and the BoF 2 characters matched up better then BoF 1.

"My name is Sweetie Belle, and I live in a world where night lasts forever."

It all began on the Summer Sun Celebration in Ponyville, a little more than a year ago. Nightmare Moon, the mare thought to be a mere legend has returned and changed our world. She forbid the sun from rising ever again, she broke our spirits and sowed seeds of distrust and sadness amongst us.

She invaded our dreams, poured nightmares into them to make us live in fear, make us obey. And those who didn't obey, ended up in dreamlocked prisons built of their dreams, wishes and fears, with no hope of returning to the real world.

As for myself... I just want my sister back.

Warning: please refrain yourself from reading the comments before the story, because spoilers!

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Unofficial sequel to Past Sins.

Ten years after the events of Past Sins, Nyx is now a responsible young mare with the best friends a pony can ask for. It was because of the friendships she made in Ponyville that she was able to finally move on from her past and look forward to the future. But when unwanted memories start to resurface, Nyx begins to realize just what her future holds in store for her.

Can she ever truly escape her past, or is she destined to embrace it?

Nyx belongs to Pen Stroke.