As long as Walrein ex is your Active Pokémon, put 1 damage counter on each Active Pokémon (both yours and your opponent's) between turns, excluding Pokémon.

Choose 1 of your opponent's Pokémon. This attack does 40 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

If the Defending Pokémon is a Pokémon, this attack's base damage is 120 instead of 80.