The Brock Arc Suit Fair is now underway in Pokémon Masters EX, introducing Arc Suit Brock & Onix as a new sync pair available through March 13. The limited-time scout gives the classic Pewter City Gym Leader a fresh arc-inspired look along with a kit built to anchor Rock-type teams and boost overall durability. As part of the ongoing Arceus arc content, the banner ties into the broader storyline while offering players a powerful new option for tougher battles. Trainers looking to reinforce their rosters will want to act before the fair rotates out.
Source: Official Pokémon Masters EX site