In The Brockster Is In!, a bottle of Heal Powder appeared as one of the items gathered from the passengers of a cruise ship in order to help cure the poisoned Pokémon Normajean was taking care of.
It allows the player to flip a coin, then if the result is heads, one of their Pokémon is no longer Asleep, Confused, Paralyzed, or Poisoned and 2 damage counters are removed from it.