Pokémon Double Pack - 100 Poké Balls DLC (In-Game) (Japan) (Nintendo Switch) - Nintendo - Digital Key

Base game is required in order to redeem.

The code can be redeemed in both games (Scarlet and Violet) via the in-game menu: X Button → Poké Portal → Mystery Gift → Get with Code/Password.The serial code itself does not have an expiration date, but it is recommended to redeem it as soon as possible.