Ability

Dust Field

As long as this Pokémon is in the Active Spot, your opponent can’t have more than 3 Benched Pokémon. If they have 4 or more Benched Pokémon, they discard Benched Pokémon until they have 3 Pokémon on the Bench. If more than one effect changes the number of Benched Pokémon allowed, use the smaller number.

Poisonous Gem

140

Your opponent’s Active Pokémon is now Poisoned.

Pokémon ex rule

When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.