Hydreigon

 is a dual-type Type/ Type pseudo-legendary Pokémon.

It evolves from Zweilous starting at level 64. It is the final form of Deino.

Biology
Hydreigon is a three-headed, draconic Pokémon with six thin, black wings that each end in two points on its back. It has a fuchsia-colored collar on its neck which surrounds its head. The main head is dark blue and has black eyes with fuchsia pupils. Hydreigon's two hands are also black and each one harbors a head; these are similarly blue with black eyes with small fuchsia collars on the inside. Its abdomen has two fuchsia stripes and its feet appear atrophied, having no claws or defined soles and two or three small toes. Its tail also sports a fuchsia stripe and ends with a black tuft.

Hydreigon is a violent, destructive Pokémon. It will attack anything that moves, determining it a foe. Its heads can consume anything. Many stories describe Hydreigon destroying entire villages. Despite its three heads, it is a singular entity, unlike its pre-evolved form Zweilous; its secondary heads lack brains and do not move or think of their own accord.