New Sync Pairs are on the way to Pokémon Masters EX with the reveal of Marnie (Alt.) & Grimmsnarl and Bede (Alt.) & Galarian Rapidash. The alternate versions of the popular Trainers will bring fresh styles and battle strategies to the game when they arrive. While full details on their moves and roles have not yet been announced, their addition expands the roster with more characters from the Galar region. Players can look forward to new scouting opportunities and team-building options once the Sync Pairs become available in an upcoming update.
Source: Official Pokémon Masters EX site
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