This story is a sequel to Petriculture

It's been several months since Pinkie Pie made a stunning admission about her past that permanently changed her relationship with her friends, particularly Twilight Sparkle, but life seems to have settled back to normal (well, normal by Pinkie Pie's standards, at least). However, when an old nemesis returns and ensnares Twilight in her influence, it's up to Pinkie to make things right.

This is the second story in The Petriculture Cycle. There is a TV Tropes Page for the entire Cycle here.

Cover image by Page Turner; "Princess Twilight" vector by Nianara.

Nightmare Moon visits Twilight in the night, and things get biblical.

Featured on Equestria Daily, 1 May 2012.

Applebloom has had a room of her very own for over a year now, and she no longer has scary dreams when she's all alone in the dead of night. But something has come back to visit her, and this time she's old enough to know two things: it's not her friend, and it's not imaginary.

A very short and moody story about one of the many things grown-ups forget.

Mood Wings - Observations on Pegasus Body Language.

When Twilight Sparkle finds this book, she discovers an entirely new field of research. The secrets of pegasus wings lie before her, and she insists on making her own observations on the matter.

How?

Field research, of course.

Instead of being killed in the cold Antarctic by Dr. Manhattan, Rorschach finds himself rematerialized in a strange new, pony filled world. He finds himself drawn into the lives of the ponies of Ponyville but some ponies fear that this sociopath will bring danger and darkness to an otherwise peaceful existence. Will the mane 6 help Walter Kovac find peace within himself or will he bring them all down with him in his cold views of reality and existence?

As Seen on Equestria Daily!
And our TvTropes page (By Crowrob0t): http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/RorschachInEquestria

My Little Pony: Friendship is Magic and its likeness is owned by Hasbro Studios. Rorschach and Watchmen are owned by DC comics. All rights go to their normal original, intended owners.

Pinkie Pie has a strange tale to tell Twilight upon discovering a very strange coin among Pinkie's possessions.

Filly Pinkie Pie wonders why Princess Celestia is sad all the time, even on her birthday. Granny Pie tells her it's because long ago the princess had to destroy her sister Luna in order to save the world and no amount of time has lessened her sorrow. Little Pinkie Pie decides she is going to make Celestia happy with the best birthday present ever! Now all she has to do is build a time machine and go back and change the past...

Posted on EQD way back in 8/7/11 EQD For your Birthday, Princess.