When a Pokémon-EX has been Knocked Out, your opponent takes 2 Prize cards.
Mega Evolution rule
When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends.
Discard all Energy attached to this Pokémon. Your opponent’s Active Pokémon is now Paralyzed and Poisoned. Put 4 damage counters instead of 1 on that Pokémon between turns.