Several Pokémon with tentacles will be appearing more frequently in Max Raid Battles in Pokémon Sword and Pokémon Shield through June 27, 2021, at 4:59 p.m. PDT. These Pokémon include Octillery, Malamar, and Grapploct. Shiny Grapploct can also be encountered.
To encounter these Pokémon in a Max Raid Battle, you'll need to connect your Nintendo Switch system to the internet through the Y-Comm or by selecting Mystery Gift in the X menu, then selecting Get the Wild Area News. After that, whenever you see a pillar of light shining from a Pokémon Den in the Wild Area, you can walk up to the Pokémon Den and interact with it to start a Max Raid Battle. This event does not affect the Pokémon encountered within Dynamax Adventures.
- Sources
Encounter Octillery, Malamar, and Grapploct in Max Raid Battles | Pokemon.com
Tentacled Pokémon lurk in Pokémon Dens during this Pokémon Sword and Pokémon Shield event, and you might find Shiny Grapploct.www.pokemon.com