This event was released to celebrate the launch of Pokémon Scarlet and Pokémon Violet. Players could acquire the event codes in selected stores around the globe.
Even if the official release date was meant to be September 16, 2022, some users were able to obtain the event codes days before. Those codes couldn't be used until September 15, 2022, when the wondercard was made available in the servers.
As of LGPE, wonder cards are no longer stored in saves. As such, players will not be able to inject this wonder card into their save using PKHeX, for the purposes of redeeming it in-game.
Format Ver.2.1.2-12, Post Updated Date:20220915_0923