From Friday, September 20th, 2024 to Sunday, September 22nd, 2024, at 23:59 UTC, then again from Friday, September 27th, 2024, to Sunday, September 29th, 2024, at 23:59 UTC, 7-star Tera Raid Battles featuring Serperior with the Mightiest Mark will be appearing at black Tera Raid crystals in Pokémon Scarlet and Violet.

Prepare to Face a Mighty Serperior!

Catch a Serperior with the Mightiest Mark! Serperior will be appearing at black Tera Raid crystals from Friday, September 20, 2024, at 00:00 UTC to Sunday, September 22, 2024, at 23:59 UTC, then again from Friday, September 27, 2024, at 00:00 UTC to Sunday, September 29, 2024, at 23:59 UTC.

The Serperior appearing during this event has Grass as its Tera Type. Be prepared—this Pokémon is a formidable foe, and it’s got the Mightiest Mark to prove it! Work together with your friends to topple this powerful Tera Pokémon!

During the latter half of this event—from Friday, September 27, 2024, at 00:00 UTC to Sunday, September 29, 2024, at 23:59 UTC—Blissey will be appearing more frequently in 5-star Tera Raid Battles. These Blissey will have various Tera Types, so prepare wisely before challenging them! Defeating Blissey will yield some delightful rewards, such as various Tera Shards and bonus Exp. Candies.

This special Serperior can be caught only once per save data. If you caught this Serperior previously during a Tera Raid Battle event, you cannot catch it again. You can still participate in Tera Raid Battles against this Serperior to obtain other rewards if you’ve already caught it.

This Serperior may be featured in future events or become obtainable through other methods.

Event Schedule

Friday, September 20, 2024, at 00:00 UTC to Sunday, September 22, 2024, at 23:59 UTC
Friday, September 27, 2024, at 00:00 UTC to Sunday, September 29, 2024, at 23:59 UTC

Serperior will have the same mark, Ability, and moves regardless of when it is caught during the event.

Featured Pokémon

7-star Tera Raid Battles: Serperior with the Mightiest Mark
5-star Tera Raid Battles: Blissey (Friday, September 27, 2024, at 00:00 UTC to Sunday, September 29, 2024, at 23:59 UTC)

What Is a Tera Raid Battle?

In a Tera Raid Battle, you’ll work together with three other Trainers to defeat a powerful Tera Pokémon before time runs out. The kinds of Pokémon encountered during Tera Raid Battle events will vary. Pokémon encountered in Tera Raid Battles may have a rare Tera Type.

Information about Tera Raid Battle Events

• To participate in Tera Raid Battle 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.
• After completing certain postgame events, you’ll be able to find black Tera Raid crystals. However, players who haven’t completed these events may still participate in these Tera Raid Battles by joining other Trainers in multiplayer.
• You’ll be able to find 5-star Tera Raid Battles after completing Pokémon Scarlet or Pokémon Violet’s main story. If you haven’t completed the main story, you may still participate in these Tera Raid Battles by joining other Trainers in multiplayer.
• A paid Nintendo Switch Online membership (sold separately) is required to participate in Tera Raid Battles with other Trainers online. Terms apply.
• Tera Raid Battle events will occur only in the Paldea region.

Source: https://sv-news.pokemon.co.jp/en/page/250.html