One question I had about Applejack's costume is whether she was supposed to be a lion or a manticore. Since manticores exist in Equestria like most mythical creatures, and her tail is braided in a way that it looks almost like a scorpion tail which manticores have. In the episode "Luna Eclisped", she dressed as a Scarecrow. Let's see if the next Nightmare Night Episode she dresses as the Tin Man.