When you play Gengar from your hand to evolve your Active Pokémon, you may put a Basic Pokémon (excluding Baby Pokémon) from your discard pile onto your Bench. Then, flip 3 coins. For each heads, choose a basic Energy card from your discard pile and attach it to that Pokémon.

Hydrokinesis

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Flip a coin. If heads, the Defending Pokémon is now Burned. If tails, the Defending Pokémon is now Confused.