It is theorised that a maintenance update for online features of Pokémon Sword and Shield has caused a portion of players who reached Master Ball Tier to be stopped from entering new battles. Fan site Serebii.net has weighed in to the discussion and suggested that it may be the new ruleset that has been added in anticipation of the 2020 Pokémon Video Game Championships. “I think part of it was that the ruleset accidentally allowed some Gigantamax Pokémon in and created an unfair advantage but I don't think banning was intentional,” it said. “This was obviously an accident and not an intended malicious act like some are framing.”
Pokémon Sword and Shield is out now for the Nintendo Switch.