Arceus Arc Celebration: Special Battle Event now live in Pokémon Masters EX! Witness the blessing of Arceus! Take on Arc Suit Diantha and Arc Suit Geeta! You can collect event points to get sync pair-exclusive lucky cookies! A new chapter has been added to the main story’s Arceus arc! As preparations for the Arceus Cup and a stage play move forward, Diantha and Geeta choose each other as partners in both acting and battling...

5★ Arc Suit Geeta & Glimmora debut! A special paid-gems-only scout is also available! You can get presents, such as custom move candies, based on how many times you use this ×11 scout!

5★ Arc Suit Diantha & Gardevoir debut! A special paid-gems-only scout is also available! You can get presents, such as custom move candies, based on how many times you use this ×11 scout!

YouTube Clip - Two classy, powerful Trainers team up for a new Arceus Cup battle!

Source: https://www.youtube.com/watch?v=mEW57Lfp-iM

YouTube Clip - Two classy, powerful Trainers team up for a new Arceus Cup battle! (Japanese)

Source: https://www.youtube.com/watch?v=YYZsbk32U3U

Arceus Arc Celebration Special Battle Event

Arceus Arc Celebration Special Battle Event Under Way!

Date/Time

July 17, 2026 at 11:00 p.m. - August 24, 2026 at 10:59 p.m.
Source: https://pokemonmasters-game.com/en-US/announcements/Event_8060_3W_1

Diantha Arc Suit Fair

5★ Arc Suit Diantha & Gardevoir Debut! Arc Suit Fair–Exclusive Sync Pair 5★ Arc Suit Diantha & Gardevoir are being featured in this limited-time Arc Suit Fair Scout! Plus, the Diantha Arc Suit Fair and the Special Present! Diantha Arc Suit Fair are under way at the same time! The Arc Suit Fair is a special sync pair scout in which 5★ sync pairs have a 12% chance of appearing!

Date/Time

July 17, 2026 at 11:00 p.m. - August 24, 2026 at 10:59 p.m.
Source: https://pokemonmasters-game.com/en-US/announcements/BSearch_8060_3W_1

Geeta Arc Suit Fair

5★ Arc Suit Geeta & Glimmora Debut! Arc Suit Fair–Exclusive Sync Pair 5★ Arc Suit Geeta & Glimmora are being featured in this limited-time Arc Suit Fair Scout! Plus, the Geeta Arc Suit Fair and the Special Present! Geeta Arc Suit Fair are under way at the same time! The Arc Suit Fair is a special sync pair scout in which 5★ sync pairs have a 12% chance of appearing!

Date/Time

July 19, 2026 at 11:00 p.m. - August 24, 2026 at 10:59 p.m.

Arc Suit Fair–Exclusive Sync Pairs

Arc Suit Fair–Exclusive Sync Pairs are Arc Suit Fair-exclusive Sync Pairs. In addition to regular Passive Skills, these sync pairs will have one Arc Suit Passive Skill that strengthens your whole team, and one that raises your team’s Type Rebuff and lowers the Type Rebuff of your opponent’s team the first time the sync pair enters each battle.

Also, Arc Suit Fair–Exclusive Sync Pairs have a special Role: Multi! Once you raise a Multi Sync Pair to 6★ EX, they’ll be able to lower the Type Rebuff of the opponent’s team the first time they use their Sync Move each battle.

Multi Sync Pairs can specialize in dealing damage like a Strike Sync Pair, or at protecting their team like a Support Sync Pair. Therefore, it is important to choose a style that matches the characteristics of your particular Sync Pair.
Note: These Sync Pairs’ characteristics are essentially their EX Role.
Note: The number and type of items needed to unlock level caps will differ from other Roles.
Note: Multi Sync Pairs can use 5★ Move Candies or Custom Move Candies to raise their move level.

Source: https://pokemonmasters-game.com/en-US/announcements/BSearch_8060_3W_2