Spiritomb

Once during your turn, when you put Spiritomb from your hand onto your Bench, you may put 1 damage counter on all Pokémon that already have any damage counters on them (both yours and your opponent's). You can't use more than 1 Curse Breath Poké-Power each turn.

Move 1 damage counter from 1 of your Pokémon to 1 of your opponent's Pokémon.