To encounter these Pokémon in a Max Raid Battle, players will need to connect their Nintendo Switch systems to the internet through the Y-Comm or by selecting Mystery Gift in the X menu, then selecting Get the Wild Area News. Simply walk up to and interact with any Pokémon Den in the Wild Area whenever you see a pillar of light shining from it to start a Max Raid Battle. This event does not affect the Pokémon encountered within Dynamax Adventures.
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Starmie, Delibird, and Cryogonal Spread Cheer in Holiday Max Raid Battles
Celebrate the season in Pokémon Sword and Pokémon Shield, and you just might encounter a Shiny Delibird.www.pokemon.com