The Pokémon Company recently confirmed the existence of a new Mythical Pokémon in Pokémon Sword and Pokémon Shield. As a special way to celebrate this discovery, details about this Pokémon will be revealed on Pokémon Day. Prior to its reveal on February 27, this month’s issue of the Japanese publication CoroCoro will unveil the silhouette of the unannounced Mythical Pokémon, which is also set to appear in Pokémon the Movie: Coco.
Source: The Pokémon Company
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