Corocoro Arceus .

This gift was distributed to players in Japan via serial code in the February 2018 issue of the Corocoro magazine.
Oddly enough, instead of being set to Genderless, it's wonder card gender was set to Random.
Regardless, due to how the game mechanic works, it will be received as Genderless.
 

Species   Arceus   Nickname   (default, save lang)   OT   コロコロ   TID   180115   Distribution   Serial Code   Location   a lovely place   Dates   Jan 15 to Mar 14, 2018   PID   Cannot Be Shiny   Games   JP 3DS: USUM

Lv. 100

Nature   Random   Ability   Multitype (1)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed  Classic

Moves   (ITALIC means Relearnable)   Judgment   Extreme Speed   Recover   Hyper Beam

WC ID 269: 「まぼろしのポケモン　アルセウス」's receiving text

0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Format Ver.1.0.5-5, Post Updated Date:20180115_2058