Darkrai

Darkrai is a Mythical Pokemon character that appears in The Legends Before Time. Known by his title as the "Lord of Nightmares", he once served under Lord Arceus, but his nightmares that he imposed among the common Pokemon, which allowed him to be strong, forced Arceus to banish him from the Palace, now serving as an opposition. He then joined forces with Giratina and many other statuses that opposed Arceus's rule. After being defeated, he, Giratina and many other opposing statuses were sent to the Chaos Realm and stripped of their powers, but later breaks out. It is unknown if he survived the cataclysmic event that befell many statuses before him. He is also the antithesis of Cresselia, known as the "Goddess of Dreams".