Jolteon ★

Once during your turn, when you put Jolteon Star from your hand onto your Bench, you may put 1 damage counter on each Active Pokémon (both yours and your opponent's).

Agility

Flip a coin. If heads, prevent all effects of an attack, including damage, done to Jolteon Star during your opponent's next turn.

You can't have more than 1 Pokémon Star in your deck.