If you registered for the 2019 International Challenge February Online Competition and completed at least three matches, you can now claim your participation prize of a Shiny Tapu Bulu. Just log in to the PGL using the game you used to participate in the 2019 International Challenge February Online Competition, and then click here. To redeem the code in your game, select Mystery Gift from the main menu, then select Receive Gift, and then select Get with Code/Password and follow the prompts to enter your special code. Be sure to enter the code in your Pokémon Ultra Sun or Pokémon Ultra Moon game before April 30, 2019, at 00:00 UTC.
Remember, you only have until April 30th, 2019 to enter in the code you receive, so make sure to get it in there right away!