Yveltal

Yveltal (イベルタル) is a / Legendary Pokémon introduced in Generation VI. It is the mascot for Pokémon Y. It is Xerneas's counterpart.

Physiology
Yveltal possesses avian and draconian traits. It has large wings and a tail that are red colored internally and black colored externally. It has intense teal-colored eyes with white pupils. When Yveltal straightens its arms in flight, it forms the shape of a Y. Its talons are also Y-shaped. Yveltal is part flying type, and based on the concept of the y-axis.

Yveltal represents destruction, such as natural disasters, while its counterpart, Xerneas, represents new life.

Behavior
When Yveltal is about to reach the end of its lifespan, it steals the life force of everything living around it, then transforms into a cocoon to sleep.

Anime
Anime appearance: Yveltal (SS036)

Yveltal made its first anime appearance in MS017 along with Xerneas and Diancie. It made an actual anime appearance in The XYZ Legend!

Trivia

 * Yveltal is the fourth Pokémon to start with a Y, the others being Yanma, Yanmega and Yamask and the first Legendary to do so.
 * Yveltal is opposing Xerneas due to Xerneas representing life and Yveltal representing destruction.
 * Yveltal's design looks similar to Lugia's but with the color scheme of Groudon.
 * Yveltal resemble Rathalos from the Monster hunter series.
 * Yveltal has its own signature move, Oblivion Wing.

Etymology

 * Its form may be a reference to Norse mythology guardians of the Yggdrasil tree: a bird-like creature that protects the top of the tree, this may be Yveltal, a deer-like creature that protects the soil and trunk of the tree, this may be Xerneas, and a snake-like creature that protects the underworld below the tree is Zygarde. It is part of Yggdrasil Trio.
 * Yveltal starts with the letter Y because it represents the Y axis (or the vertical one, and as Yveltal is in the sky, it’s a perfect fit!) in the 3D axis of X, Y and Z.