Mawile

Pick Out
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Choose 1 face-down Prize card <em> - yours or your opponent's
Choose 1 face-down Prize card (yours or your opponent's) and put it face up. If that card is a Supporter card, use the effect of that card as the effect of this attack. (That card remains face up for the rest of the game.)

Jaw Bite - Steel - 20
During your next turn, if an attack does damage to the Defending Pokémon (after applying Weakness and Resistance), that attack does 20 more damage.