Pokémon Scarlet and Pokémon Violet are now available for Nintendo Switch. Read on below to learn more about a new in-game event:

Enjoy Mass Outbreaks of Eevee!

Encounter Eevee Everywhere!
It’s time to celebrate Eevee Day! Until Monday, November 20, 2023, at 23:59 UTC, mass outbreaks of Eevee will be appearing throughout Paldea and Kitakami.

Eevee encountered in these special mass outbreaks are more likely to have a special mark depending on their location. Show your love for the Evolution Pokémon by catching lots of Eevee!

Event Schedule

Friday, November 17, 2023, at 00:00 UTC to Monday, November 20, 2023, at 23:59 UTC

Featured Pokémon

Eevee

Locations

Paldea

Eevee encountered in these special mass outbreaks throughout Paldea are more likely to have the Jittery Mark, Intense Mark, Intellectual Mark, or Flustered Mark.

Kitakami

Eevee encountered in these special mass outbreaks throughout Kitakami are more likely to have the Rowdy Mark, Excited Mark, Calmness Mark, or Unsure Mark.

What Is a Mass Outbreak?

Mass outbreaks are a phenomenon in which many of the same species of Pokémon appear in one location. During limited-time mass outbreak events, certain Pokémon will become more likely to appear.

Check the Poké Portal for more information about what Pokémon are appearing in mass outbreak events.

Information about Mass Outbreak Events

• To participate in mass outbreak events, please download the latest Poké Portal News by selecting Poké Portal from the X menu, then Mystery Gift, then Check Poké Portal News. You do not need a paid Nintendo Switch Online membership to receive the latest Poké Portal News.
• While purchasing The Hidden Treasure of Area Zero is not required to participate in this mass outbreak event, there may be future mass outbreak events that occur exclusively in locations that cannot be accessed without The Hidden Treasure of Area Zero.​​

Source: Pokémon Scarlet and Violet news