Sudowoodo 066/145 - SM Guardians Rising

Your opponent can't have more than 4 Benched Pokémon. If they have 5 or more Benched Pokémon, they discard Benched Pokémon until they have 4 Pokémon on the Bench. If more than one effect changes the number of Benched Pokémon allowed, use the smaller number.