Tool Cards were introduced to as part of the expansion. Three of these Tool Cards were added to the game and are a new concept for those unfamiliar with the real life Item and Supporter cards could already be used on Pokémon, but Tool Cards work differently. They are added to a Pokémon in your active spot or on the bench and remain with them for the rest of battle.
Like Item and Supporter Cards, some are more effective than others. However, they have caused a huge change in battles already.
So far, three Tool Cards have been introduced to and are being commonly used in PvP battles. Giant Cape is proving very popular as it adds 20 HP to the Pokémon it is attached to.
It is one of the best cards to use in battle in the expansion. The Rocket Helmet deals 20 damage back to the opponent any time your Pokémon takes damage itself, again making it a useful choice.
Players regularly use these both in battles, as once they have been picked up from the deck, they can have a direct impact on a player's best cards.