Princess Luna

Princess Luna (known as Nightmare Moon when transformed) is one of the main characters of My Little Pony: Scootertrix the Abridged. She is voiced by Cris Galvez as Princess Luna, and Jack Getschman as Nightmare Moon.

Biography
Princess Luna ruled all of Equestria alongside her older sister, Celestia, and together they created harmony throughout all the land. Luna had the responsibility of raising the moon, while her sister had to raise the sun. One day, she turned green with envy of Celestia's powers and transformed into Nightmare Moon as she tried to take her down. Distracted by her sister, Luna got banished to to the moon for a thousand years.