This gift was given to players via serial code that purchased tickets to the Pokémon M22: Mewtwo Strikes Back EVOLUTION in Korea.
Format Ver.1.0.8-4, Post Updated Date:20201001_0042
What can be done with these files
PKM creation with PKHeX (drag & drop the wondercard file in the spot where you want the Pokémon)
In-Game Mystery Gift redemption with Switch Gift Data Manager