Shiftry

Once during your turn (before your attack), you may switch 1 of the Defending Pokémon with 1 of your opponent's Benched Pokémon. Your opponent chooses the Benched Pokémon to switch. This power can't be used if Shiftry is affected by a Special Condition.

If there is any Stadium card in play, this attack does 50 damage plus 20 more damage.