This gift was distributed to players that are members of the Secret Club, to commemorate the registration of 100,000 members with the Pokémon Secret Club!
In order for players to join the Secret Club, players must pre-order Sword & Shield from a participating Japanese retailer.
Players would then receive a code that is required to register with the Secret Club.
The Trainer ID 000132 appears to be a pun based on Secret Club: 1 (hi from hitotsu - first) 3 (mi from mitsu - third) 2 (tsu; Japanese' roman pronunciation of 2) -> Himitsu (means secret)
Additionally, the words "Club" on the website have been replaced with a Krabby icon; Krabby's Japanese name (クラブ) has the exact same katakana characters as the word Club (クラブ).
Format Ver.1.0.8-3b4, Post Updated Date:20191101_0406
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