Nachtara-ex

Once during your turn (before your attack), when you play Umbreon ex from your hand to evolve 1 of your Pokémon, switch 1 of your opponent's Benched Pokémon with 1 of the Defending Pokémon. Your opponent chooses the Defending Pokémon to switch.

Black Cry

20

The Defending Pokémon can't retreat or use any Poké-Powers during your opponent's next turn.