Pinkie Pie: "Baby Flurry Heart's Heartfelt Scrapbook". Page 7 - "Nightmare Night". Ooooooooh... This is Princess Luna. You met her. Awesome, right? Well, you won't believe this, Flurry Heart, but she wasn't always the sweet, friendly princess that you know. A long time ago, she got angry with her sister Celestia and transformed herself into Nightmare Moon! She wanted it to stay night forever, and Celestia had to trap her sister in the moon for a really long time! Soon, the story of Nightmare Moon became something that ponies would tell foals and fillies to scare them. Eventually, ponies created a whole holiday to celebrate it. We call it Nightmare Night! On Nightmare Night, ponies dress up in all kinds of amazing costumes. One time, I dressed up like a chicken. I know what you're thinking. "Best costume ever!" [giggles] Thanks, I know. It was the best costume ever. Anyhoo, Nightmare Night is a night for spooky stories and pranks where everypony gets really scared, but in a fun way. When Princess Luna came back from being banished to the moon, she got her feelings hurt because there was a whole holiday that was all about being scared of her. But your Aunt Twilight showed her that we all like being scared. Well, hm, except for Fluttershy. So now, we still have Nightmare Night. We still dress in costumes and scare other ponies and get candy, but now we also celebrate it because Nightmare Moon is gone and we have Princess Luna back. And that's a great thing to celebrate. Ooh! I wonder what you'll dress up as for your first Nightmare Night, Baby Flurry Heart. I really hope you'll let me help you pick out a costume. I have so many ideas!