lol nope, you see...........Nightmare is really LUNA!!!!!!! XD but really Nightmare moon is just Luna evil version of herself, it started when Luna noticed that nopony was playing during nightime (since shes the one that lifts the moon) and for that she thought that everypony hated the night and then her anger infused with her and made her evil and since she was banished for 1000 years on the moon her evil developed more and more.
hehe Happy Halloween you too! and they look really cute and pretty like that, Luna looks pretty wearing that dress. I also love her pretty hair and her cute face. Zecora looks great too. she's a beautiful zebra lady! hehe awesome job!