You can now invite Misty to the Trainer Lodge in Pokémon Masters EX after you have teamed up with Misty & Starmie

If you have already teamed up with Misty and Starmie in Pokémon Masters EX, there is a new perk waiting for you. Misty can now be invited to the Trainer Lodge, where you can chat, raise her friendship level and unlock exclusive rewards. Spending time together in the lodge opens up new conversations and bonuses, giving longtime fans another reason to log in and build out their roster. It is a small but welcome update that adds more personality to the game and gives players a fresh goal to work toward alongside the u

Source: Official Pokémon Masters EX site