You may attach any number of Pokémon Tools to your Pokémon during your turn. You may attach only 1 Pokémon Tool to each Pokémon, and it stays attached.
"If the Darkness Pokémon this card is attached to is in the Active Spot and is damaged by an attack from your opponents Pokémon (even if it is Knocked Out), place 4 damage counters on the Attacking Pokémon."
