Yveltal

Yveltal (イベルタル) is the dual-type / Destruction Pokémon. It, along with Xerneas, are Legendary Pokemon of Pokémon X and Y. Its body is shaped like the letter "Y".

Physiology
As a bird based Pokémon,it has huge flaps that are red colored internally and black colored externally.When Yveltal straightens its arms in flight, it forms the shape of the letter "Y".

Behavior
Yveltal represents destruction, so it seems to be an angry Pokémon.

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 has the color scheme of Groudon.
 * 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.
 * Its name may come from the word tall since it can fly and start with the letter Y because it represents the Y axis in the 3D axis of X, Y and Z.