The two heads do not get along. Whichever head eats more than the other gets to be the leader. After it has eaten up all the food in its territory, it moves to another area. Its two heads do not get along.
Ability: Hustle, which boosts the Attack stat but lowers accuracy.
Hidden Ability: None
Weaknesses: Fighting, Ice, Bug, Dragon and Fairy
Resistances: Ghost, Dark, Fire, Water, Grass and Electric
Evolutions: Zweilous evolves from Deino starting at level 50 and into Hydreigon starting at level 64.
Height: 4′ 07″ Weight: 110.2 lbs