Zweilous (Japanese: ジヘッド Jiheddo) is the evolution of Deino, and the pre-evolution of Hydreigon. It now has two heads. It evolves into Hydreigon at level 64, therefore it is one of the hardest dragon type Pokémon to evolve.

How do you evolve Zweilous?

To evolve Zweilous, all you need to do is level up it up until it hits level 64, in which it will evolve into Hydreigon, the dark/dragon-type. Simply bring it into your party to gain experience or feed it experience candy to help level it up.

Is Mega Hydreigon real?

352.7 lbs. Hydreigon is a dual-type Dark/Dragon pseudo-legendary Pokémon. ... It can Mega Evolve into Mega Hydreigon using the Hydreigonite.