Players of Pokémon Scarlet and Violet can encounter Swampert with the Mightiest Mark in 7-star Tera Raid Battles at black Tera Raid crystals from Friday, May 31st, 2024 to Sunday, June 2nd, 2024, at 23:59 UTC.

Prepare to Face a Mighty Swampert!

Catch a Swampert with the Mightiest Mark! Swampert will be appearing at black Tera Raid crystals from Friday, May 31, 2024, at 00:00 UTC to Sunday, June 2, 2024, at 23:59 UTC, then again from Friday, June 7, 2024, at 00:00 UTC to Sunday, June 9, 2024, at 23:59 UTC.

Swampert cannot normally be encountered in Paldea, and the Swampert appearing during this event has Poison 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, June 7, 2024, at 00:00 UTC to Sunday, June 9, 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 Swampert can be caught only once per save data. If you caught this Swampert previously during a Tera Raid Battle event, you cannot catch it again. You can still participate in Tera Raid Battles against this Swampert to obtain other rewards if you’ve already caught it. This Swampert may be featured in future events or become obtainable through other methods.

Event Schedule

Friday, May 31, 2024, at 00:00 UTC to Sunday, June 2, 2024, at 23:59 UTC
Friday, June 7, 2024, at 00:00 UTC to Sunday, June 9, 2024, at 23:59 UTC

Featured Pokémon

7-star Tera Raid Battles: Swampert with the Mightiest Mark
5-star Tera Raid Battles: Blissey (Friday, June 7, 2024, at 00:00 UTC to Sunday, June 9, 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/229.html