Nightmare Moon (voiced by Tabitha St. Germain) is the evil verison of Princess Luna. She is the main antagonist of My Little Pony: Friendship is Magic, Friendship is Magic Part 1 and 2.
- Nightmare Moon, along with Dark Sombra, their family, Bill Cipher, The Fearsome Crooks, Christine, Jackson Storm and K.A.R.R. are the main antagonists of Yuna's Princess Adventure series.
- Nightmare Moon and her family's main goal is to steal the 13 Journals, join forces with all other villains including Bill Cipher and rule Equestria and the next world of the universe.