The Champion Stadium: Unova Challenge is underway in Pokémon Masters EX, running from Nov. 1 at 10 p.m. PT through Dec. 6 at 9:59 p.m. PT. Trainers can take on powerful opponents for a chance to enter the Hall of Fame; access requires completing Main Story Chapter 10, “A Reason to Battle,” on Normal difficulty and collecting all PML Badges.
Source: Official Pokémon Masters EX site
