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 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), move an Energy from the Attacking Pokémon to 1 of your opponents Benched Pokémon."