The Coin Bag becomes usable once the player transfers a Postcard to Pokémon Scarlet or Violet. Once unlocked, the Coin Bag can be opened for 30 minutes to spawn wild Roaming Form Gimmighoul. After this, the player must transfer another Postcard to Pokémon Scarlet or Pokémon Violet to open the Coin Bag again. A player can transfer up to one Postcard from Pokémon GO each day, with the cooldown period resetting at midnight local time.
