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.
Yveltal is set for an anime appearance in M17 along with Xerneas and Diancie
Yveltal battled Xerneas and destroyed X and Y's hometown, Vaniville Town.
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 in the 3D axis of X, Y and Z.