Nightmare Moon

Nightmare Moon is the leader of the My Little Pony friendship is magic heroes

Hades released Nightmare Moon for helping him to defeat his brother but nightmare moon reufuse to listen to hades so she fights and defeated hades

Nightmare Moon came to the forbidden mountains and challege Maleficent (even in her dragon form) but unfortuntaly maleficent lost to Nightmare Moon

Nightmare Moon then released Discord from his stone prison to take on Aku and Merlock Discord defeated the 2 villains like it was nothing to him