A +3/-3 is just as effective at killing things outright but it has no Healing Salve option
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I especially like Roseannes Research and the pokeball
You only see it in Commander, or in recent Standard decks thanks to the Lorwyn Eclipsed reprint
The attack is perfect for players who are using a non-GX deck, as this ability known as Foul Play, allows the player to use any of the attacks that the defending pokemon has, which includes GX attacks