Pokémon Masters EX has confirmed that the next High Score Event will arrive in July, with Water- and Grass-type sync pairs set as the recommended choices for the challenge. Players will be able to build teams around those types to earn higher scores and compete for rewards during the limited-time event. High Score Events have become a popular endgame activity in Pokémon Masters EX, especially for players focused on optimizing team setups and pushing damage totals against tougher battles.
Source: Official Pokémon Masters EX site
Pokémon Blog 