Deino (Japanese: モノズMonozu) is a Dark/Dragon-typePokémon based on the powerful Lernaean Hydra from Greek mythology. Each time it evolves, it grows one more head. It evolves into Zweilous at level 50, and later into Hydreigon at level 64.
Deino is a small, blue dinosaur-like Pokémon with black fur covering its neck and most of its head. It has a small tail and a tuft of fur atop its head. The pink marks around its collar are wounds.