To tie in with the Mid-Autumn Moon with Pippi 2023 festivities, a Mass Outbreaks of Clefairy will occur in Pokémon Scarlet and Violet from Friday, September 29th, 2023, at 00:00 UTC to Sunday, October 1st, 2023, at 23:59 UTC

Mass Outbreaks of Clefairy!

Enjoy a Moon-Viewing Party with Lots of Clefairy! The full moon calls to Clefairy, causing them to gather en masse. Until Sunday, October 1, 2023, at 23:59 UTC, mass outbreaks of Clefairy will be appearing throughout Kitakami and Paldea.

You normally can’t find Clefairy in the Paldea region, but during this event, you may find mass outbreaks of Clefairy there! Clefairy encountered in these special mass outbreaks are also more likely to have the Upbeat Mark. They must be in high spirits from basking in the moonlight!

Event Schedule

Friday, September 29, 2023, at 00:00 UTC to Sunday, October 1, 2023, at 23:59 UTC

Featured Pokémon

Clefairy

Locations

Kitakami and Paldea

What Is a Mass Outbreak?

Mass outbreaks are a phenomenon in which many of the same species of Pokémon appear in one location. After the release of The Hidden Treasure of Area Zero Part 1: The Teal Mask for Pokémon Scarlet or Pokémon Violet, limited-time mass outbreak events will begin. During these events, certain Pokémon will become more likely to appear in mass outbreaks!

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.
• You will also need to download and install the latest update data for your game once The Hidden Treasure of Area Zero Part 1: The Teal Mask for Pokémon Scarlet or Pokémon Violet has been released.
• 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 in locations that cannot be accessed without The Hidden Treasure of Area Zero.​​

Source: https://sv-news.pokemon.co.jp/en/page/124.html