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Zweilous is a Dark & Dragon Pokémon which evolves from Deino. It is vulnerable to Fairy, Fighting, Bug, Ice and Dragon moves. Zweilous's strongest moveset is Bite & Dragon Pulse and it has a Max CP of 1,839. Zweilous evolves into Hydreigon.
"After it has eaten up all the food in its territory, it moves to another area. Its two heads do not get along."
Mix Altaria and Vigoroth and you get Zweilous. The two-headed dragon brings very consistent damage with Dragon Breath (4 DPT, 3 EPT) and Body Slam (60 power, 35 energy), whether or not the opponent has shields available. Dark Pulse (80 power, 50 energy) is the secondary charged move of choice. On its own, it's a stronger move than Dragon Pulse, and Dragon Breath deals enough dragon damage, so Dark Pulse provides meaningful coverage against top Psychic- and Ghost-type threats in the game.
Zweilous is a beast of a Pokémon. It has positive matchups against Umbreon, Bronzong, Hypno, Jirachi, Haunter, Sableye, Grasses, and Lanturn. While you do have to keep it away from Charm users, Flyings (Skarmory, Altaria, Dragon Tail Lugia), Azumarill, and Counter users, its positive matchups and absolutely incredible moveset let this Pokémon run wild in the format.
Only maxing out at 1839 CP, Zweilous really struggles to perform against threats that actually get close to the format's CP cap. Probably better to look elsewhere.
Don't bring a baby to a godfight. Leave Zweilous down in Great League.
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