The shadow pony that resides in the castle of the ancient pony sisters has gathered enough power to break free from the spell that keeps the remnants of Nightmare Moon's powers in the castle. The shadow pony has risen to become Nightmare Moon. Only the Cutie Mark Crusaders will be able to manage to save Equestria.

This is Luna's secret Diary. No pony knows about it except for her. But now you know. Now you know. Now you shall know all of the pain and heartache that came with being Luna. Why everything happened. Why she became Nightmare Moon.

Happy April Fools Day!
It's time to get your pony on!
Twilight Sparkle is pranking her friends.