GAME FREAK Mew (20th anniversary bundle) ᅟᅟᅟ

Those who purchased the 20th Anniversary 2DS Bundle from Japan gets a serial code to redeem this event.
The serial code was also given away to those that purchased the Virtual Console versions of Pokemon Red, Green, Blue, or Yellow from e-Shop.
 

Species   Mew   Nickname   (default, save lang)   OT   ゲーフリ   TID   22796   Distribution   Serial Code   Location   GAME FREAK   Dates   Feb 27, 2016  to Mar 31, 2017   PID   Cannot Be Shiny   Games   JP 3DS: XYORAS

Lv. 5

Nature   Random   Ability   Synchronize (1)   Item   None  Premier

Moves   (ITALIC means Relearnable)   Pound   (None)   (None)   (None)

WC ID 137: 「まぼろしのポケモン　ミュウ」's receiving text

0x52 This is a gift from GAME FREAK! Please pick up your gift from the delivery girl in any Pokémon Center.