Once during your turn (before your attack), you may attach a Fire Energy card from your discard pile to 1 of your Benched Pokémon. This power can't be used if Blaziken is affected by a Special Condition.

Fire Stream50

Discard a Fire Energy card attached to Blaziken. If you do, this attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)