Giratina

Giratina (Lord Giratina by others) is a Legendary Pokemon character that only appeared in The Legends Before Time. Known as the third son of Arceus and the embodiment of antimatter and all things chaotic, he held a grudge against his father for banning him into the Chaos Realm due to a misunderstanding with his actions towards the common Pokemon. As a result, he joined forces with other statuses who opposed his father's rule, including Reshiram, Zekrom, and Kyurem. With the help of Waffle, Arceus managed to regain his lost power and banish his son and the opposing statuses to the Chaos Realm and stripped them of their powers, ensuring that they never escape from it. After his banishment, he returns, only to die alongside many other statuses by the hands of a mysterious Pokemon.

After his death along with many other statuses, he is often described in rumors in later times as being the "devil", and infamously labelled among Dark, Dragon, and Ghost type Pokemon, referring them as "The Beast's Connection".

Physical Appearance
Giratina appears as a large, gray draconic Pokemon with a dark face and red eyes. In his Origin Forme, he appears with large dark wings having red spikes on them, along with the golden circlings on his back. His large crown-like head is gold, along with his claws, and his belly is black with red horizontal lines.

In his Altered Forme, he takes the look of a flying malicious serpent, with his wings resembling tentacles. His horns are also backwards with the lower part of the crown covering his mouth, and has spike-like legs.

In his Primal form, he becomes more monstrous, with a larger silver horn protruding from his crown and a red face. The circlings on his back and his crown are sharper and now has a clear gray coat, with his belly resembling a clear void. His claw-like hands take the color of the void, and half of his body will sometimes be obstructed by a large void.

The Legends Before Time
It was said that 20 years ago, Giratina was stirring up chaos among the common Pokemon, to which some didn't oppose, but Arceus had to step in and banish him to the Chaos Realm, hoping that he would never cause trouble again. However, 20 years later, he manages to escape the Chaos Realm thanks to the help from Darkrai, Reshiram and Zekrom. While freed, he vowed vengeance against his father and his empire, hoping to take over as the new ruler. He is joined by opposing statuses such as Marshadow, Hoopa, Yveltal, Necrozma, Kyurem and Eternatus, who also wished for his father's dethroning. They unleashed their scheme by creating distractions among Arceus's forces, and managed to cripple many other Pokemon using their newfound powers, mostly with Xerneas due to Zygarde not calling her back from her hunt for Yveltal himself.

After his own alliance except Marshadow and Necrozma managed to topple others, Giratina called them back to him to unleash a devestating attack that would spread worldwide, damaging even Arceus himself and destroying the palace in the process. While Arceus and his forces were unconscious, Giratina and his allies then began their worldwide chaos towards the world using their powers, even murder among the common Pokemon and creating a dystopia under his rule. While he let them do their own thing, Waffle himself hatched a plan, which was getting everyone else to gather Arceus's Plates, which would help him regain his strength. When Darkrai found out that Waffle defeated both Marshadow and Necrozma, he was quick to go on the offensive.

While his allies fought against Arceus's forces, he goes after his own father and his brothers with his own newfound power, which was a Primal form that he had his father kept a secret from his brothers. Because of his powers, he easily damaged his brothers and sent them into the void, along with many other statuses that interrupted his onslaught as well as severely wounding his father. After his allies were defeated by Waffle and Keldeo, he was about to kill his father before Waffle himself stepped in and blocked the attack with Counter, although he took damage from it. Angered, he engaged in a battle against Waffle and the statuses with his newfound form, sending half of them into the void and managing to almost defeat them until his greatest attack failed due to Arceus's Plates protecting them.

When Arceus regained his strength to achieve his Primal form, Giratina was quick to unleash many powerful attacks on him, to which they were useless as Arceus prepared his Final Judgement, stripping Giratina and many other opposing forces of their powers and sending them to the Chaos Realm, although he expressed some regret on banishing his son once again.