As long as this Pokémon is your Active Pokémon, any damage done to your Pokémon by an opponent's attack is reduced by 30 (after applying Weakness and Resistance).
If there is any Stadium card in play, this attack does 50 more damage.
Pokémon-EX rule: When a Pokémon-EX has been Knocked Out, your opponent takes 2 Prize cards.
