Pokémon Masters EX is bringing the Sinnoh region’s Neo Champions into the spotlight with a new special event featuring Dawn, Lucas, Origin Forme Dialga and Palkia. The story follows Barry and Rei after they are pulled into a mysterious portal, forcing Dawn and Lucas to unleash the power of the Legendary Pokémon Dialga and Palkia to rescue them. Players can also team up with Cynthia and Glaceon by completing missions during the event, adding another major Sinnoh-focused storyline to Pokémon Masters EX.
Source: Official Pokémon Masters EX site
Nintendo & Pokémon Blog 
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