Another Dark Gym Cup has begun in Pokémon Duel. This special Gym Cup increases the movement of Dark-type figures and increases the White and Gold Attacks of Fairy-type Pokémon by 20. Within the latest Dark Gym Cup, Pokémon Duel players can get the special Honchkrow figure. The Dark Gym Cup is scheduled to run until February 26, 2018.
Source: Serebii.net
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