Talk:Princess Twilight Sparkle - Part 2/@comment-26973802-20140221035353

This episode basically confirms that the Nightmare Rarity arc is non-canon.

Why? Because the comics establish Nightmare Moon and Princess Luna as two separate entities, because it's clearly the same Nightmare Moon possessing Rarity from the way she talks. While as far as Twilight knows, from what she said, Nightmare Moon and Luna are one and the same. Not that I don't think Nightmare Moon is somewhat separate, like Yami Marik, but Twilight doesn't know that because nothing in the episodes suggests it (it was Lauren Faust that did).