This gift was distributed to players via a serial code for purchasing the April Issue of the Coro Coro Magazine.
Using the Dynamax Crystal would allow the Pokémon to appear at the Watchtower Lair's Den as a max raid.
To be able to use the items associated with the event, including injecting items into the save and getting it to work,
the player's Switch must be connected to the internet, with the Mystery Gift>Get Wild Area News option used during the event period.
Alternatively the player must have connected to the internet and redeemed a Mystery Gift during the event period.
As of LGPE, wonder cards are no longer stored in saves. As such, players will not be able to inject this event into their save using PKHeX.
Format Ver.2.0.0-8, Post Updated Date:20200321_2156