As long as Hariyama ex is your Active Pokémon, your opponent can't play any Stadium cards from his or her hand.
Choose 1 card from your opponent's hand without looking and discard it.
During your opponent's next turn, any damage done to Hariyama ex by attacks is increased by 10 (before applying Weakness and Resistance).
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.