Yveltal

Yveltal, the Destruction Pokémon is a hostile one-of-a-kind giant flying soul-stealing monster from the homonym franchise, first introduced as the emblematic pokémon of the 3DS videogame Pokémon Y. It has the status of a legendary pokémon as much as others like Palkia, Zekrom or Kyurem do and, faithful to the nature of such pokémon, has high stats and no evolution.

Nature
Its malevolent nature could be inferred at first glance by Yveltal's Dark-Flying type, but is better defined by one of the most heartless and harmful acts ever committed by a pokémon that has ever been seen in the franchise universe: When Yveltal is nearing the end of a life cycle, he will absorb every proximate soul and use it as energy; that way, this creature can continue living for another thousand years even if it has to revert back to a cocoon. It is unknown what becomes of the souls he steals but they can come from humans or pokémon alike. This pokémon is said to lie dormant in an unknown place during the game's events which is a habit that this pokémon could have every life span.

Biology
Yveltal is an giant red-and-black avian, most of his physiology is dark-colored. It has five appendages aligned in all over its body in which the odd three ones are prominent and each end in five claws, the ones at the extreme ends are used as wings to keep this pokémon airborne and the middle one reminisce a tail. The other two even appendages resemble talons and are remarkably shorter. The pokémon has also blue eyes, a greyish ruff covering the lower diameter of its long neck and black horns that extend all the way from its snout, the trident-like patterns adorning the prominet appendages also protrude from its beak-like snout. As told by Professor Sycamore, this pokémon is better distinguished as a giant letter "Y".