Lunas Diary
The older light sister found nightmare moon in the castle her dark horn already pouring night into the sky intent on making it last forever to appease the younger sister trapped inside of her.
Little Star Chapter 1
Thankfully, her time in the sun actually gave her some rest, because she had yet to sleep since twilight managed to release her from nightmare moon's grasp.
Thoughts Behind the Scales
Especially nightmare moon, she's awesome. and i was not expecting their own parents to show up to assist us. king orbash? queen sunflare? even dad never once mentioned them to me. the power they possess...
Nightmare, Nightmare Chapter 1
A quick look showed it was deserted and strangely nightmare moon themed. but those statues depicting nightmare moon were utterly creepy. but it was a good place to set up shop and be in her true form in safety.
My Little Delirium - Chapter 3
The figure in stone was imposing, wings outstretched and teeth bared, nightmare moon watched them with a menacing, if unchanging, glare.
A Hundred Miles Traveled
nightmare moon. i met nightmare moon deep within the everfree forest. what would have happened had i not made that choice when i did? "it is dizzying, isn't it?
Home to Stay
An' it's all thanks ta nightmare moon and princess luna that we have it!"
Nightmare, Nightmare Chapter 3
One of the best perks of being nightmare moon. the freaking clones.
Death To Nightmare Chapter 4
Many of you believe nightmare moon has returned. as you can see by dear sister luna is right here, not as her alter ego nightmare moon. besides from nightmare night she does not don that persona's form at all.
Chapter Three: Explained Extractions, Unknown Reasons (edit 2/13/2015)
The farthest back i can go is when you were sent to ponyville not long before the return of nightmare moon.
Death To Nightmare Chapter 5
"ma'am i saw it myself, nightmare moon is back but she isn't acting herself. she saved that airship and did a speech i would have expected to see princess twilight or princess cadance spout."
Awake chapter 2 : Where to?
The purple mare was practly bouncing an the notion of flying "i meen the only time i was in the air was the ride to ponyville, an then i couldn't enjoy it because i was so worryed about nightmare moon!" "dont you have that big o'l hot air ballon?"