Pokémon Trading Card Game - Koga's Koffing - Gym: Challenge 48

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If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.

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Flip a coin. If heads, shuffle Koga's Koffing and all cards attached to it into your deck (after doing damage).

LV.15 #109