Zweilous (#634) is a Dark/Dragon-type “Lair Pokémon” introduced in Generation V. It has the abilities Hustle or Youngster, which boost its attack but reduce accuracy. Zweilous evolves from Deino and later into Hydreigon. It inhabits caves and mountainous regions, often dwelling in darkness. A curious fact is that Zweilous’s two heads sometimes argue, each trying…