Deino has a powerful sense of smell, and it rushes to bonk its head into anything that smells new. If you’re just learning to cook curry, Deino is a great partner as it loves even a poorly made dish.

Brainscans show that Zweilous only has one mind between both heads. Although the heads don’t get along, they almost always make the same decision. Their bickering is closer to an internal dialog than a fight between two different Pokémon.

When Hydreigon evolves, both its original heads become arms that can fire off Moves of their own and its brain matter reforms in the middle. Sometimes it argues with its arms out of habit, but they don’t talk back anymore.