DeNA has announced that that Legendary Arena: Latios and Lance Poké Fair Scout have been added to Pokémon Masters and will be available from August 19th, 2020 at 11:00 p.m. until September 2nd, 2020 at 10:59 p.m.

Legendary Arena: Latios Newly Added!

Legendary Arena: Latios Available Now! Legendary Arena: Latios is a brand new battle area that has just been added today! You can complete the related missions to earn Medals that can only be obtained here!

Date/Time

August 19, 2020 at 11:00 p.m. - September 2, 2020 at 10:59 p.m.

Legendary Arena Details

The Legendary Arena is a special battle area where you can form multiple teams and take on the challenge using a set number of sync pairs. Each difficulty level has a maximum number of sync pairs that can participate. Sync pairs that have already participated cannot do so again until the challenge has been reset. Strategically form teams for each Legendary Arena challenge and take on the boss!

Missions

You can earn Medals and other completion rewards that are only available during this Legendary Arena challenge period! Check the Missions screen to learn more! Note: For more details about missions, tap the Mission Completion Rewards button displayed on the Legendary Arena difficulty selection screen.

Important

• To attempt Legendary Arena missions, you must have completed Main Story Chapter 2: Defeat Team Break! (Normal) in single-player.
• To learn more details about the Legendary Arena, tap the Information button on the main Legendary Arena screen.
• While Legendary Arena missions will also be displayed on the General missions screen, they cannot be attempted outside of the challenge period.
• The time period and featured content are subject to change without notice.

Source: https://pokemonmasters-game.com/en-US/announcements/Event_2070_3W_3

Lance Poké Fair Scout

Team up with a fair-exclusive sync pair in the Poké Fair Scout now! 5★ Lance & Dragonite are being featured in this limited-time Poké Fair Scout! 5★ sync pairs have a 10% chance of appearing in the Poké Fair Scout! Featured sync pairs have a higher chance of appearing than non-featured 5★ sync pairs. Don’t miss your chance to team up with this fair-exclusive sync pair! 5★ Lance & Dragonite’s sync grid will also be expanded in conjunction with this sync pair scout.

About Lance & Dragonite

This Indigo League Champion deals massive blows with Hyper Beam!

Date/Time

August 19, 2020 at 11:00 p.m. - September 2, 2020 at 10:59 p.m.

Important

• Please note that you cannot have two or more sync pairs that include Trainers with the same name in your team.
• 5★ Lance & Dragonite are a fair-exclusive sync pair.
• Fair-exclusive sync pairs are sync pairs that will appear for a limited time during this Poké Fair Scout.
• There is a possibility that they will appear in other Poké Fair Scouts in the future as well.
• Sync pairs other than the ones mentioned above may also appear in the Poké Fair Scout.
• To unlock the sync grid, you must have completed Main Story Chapter 2: A Friendly New Rival (Normal) in single-player.
• To check the available sync pairs and their respective offering rates, go to the Offering Rate section on the Sync Pair Scout screen.
• Please read the Notes section under Offering Rate on the Sync Pair Scout screen before using the feature.
• The time period and featured content are subject to change without notice.

Source: https://pokemonmasters-game.com/en-US/announcements/Scout_2070_4W_1