When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
Block Dust
As long as Vileplume ex is your Active Pokémon, your opponent can't play any Trainer cards (except for Supporter cards) from his or her hand.
Special Formula
Flip a coin. If heads, the Defending Pokémon is now Asleep and Poisoned. If tails, the Defending Pokémon is now Confused.