Attach Berry to 1 of your Pokémon that doesn't have a Pokémon Tool attached to it.

At any time between turns, if there are at least 2 damage counters on the Pokémon Berry is attached to, you may remove 2 of them and discard Berry. At the start of each turn, if there are at least 2 damage counters on the Pokémon Berry is attached to, remove 2 of them and discard Berry.