Healing Berry (Aquapolis 125/147)

Healing Berry

At the end of any turn, if the Pokémon this card is attached to has 20 HP or less, remove 3 damage counters from that Pokémon and discard this card.

Card rule

Attach Healing Berry to 1 of your Pokémon that doesn't already have a Pokémon Tool attached to it. If that Pokémon is Knocked Out, discard this card.