Another Max Raid event has begun in Pokemon Sword and Shield. This one only runs through this weekend, and it revolves around the series’ adorable mascot, Pikachu.
From now until August 9, Pikachu, Pichu, Raichu, and Alolan Raichu will all appear more frequently in Max Raid dens across both Sword and Shield. On top of that, you’ll have a chance to find a Shiny Pikachu in five-star Raids, and it seems Mimikyu has snuck into some dens as well as part of this event.
The Pikachu Mass Appearance event runs until 4:59 PM PT on August 9, so you only have a limited time to take part in it. Before the Pikachu will begin appearing in your game, you’ll need to refresh your Raid dens. You can do so either by connecting online via the Y-Comm or going into Mystery Gift from the menu screen and selecting Get the Wild Area News.
Source: Gamespot Catch Shiny Pikachu In Pokemon Sword And Shield's Latest Raid Event