The official Pokémon website has announced the full details for the Shiny Toxtricity Event Pokémon distribution. Players in the United States, Canada and Australia can visit participating GameStop or EB Games stores to get a serial code via the Pokémon Pass app from February 19th, 2021 until March 18th, 2021.

Distribution Locations Worldwide:

Canada, Australia, New Zealand: EB Games
United States: Gamestop
Germany, Italy: Gamestop Online
France: Micromania Online
Belgium, Netherlands: GameMania's Online

Visit GameStop and Rock Out with Shiny Toxtricity in Pokémon Sword and Pokémon Shield

Get a code for a Shiny Toxtricity by using Pokémon Pass at GameStop in the United States or by visiting EB Games in Canada and Australia.

Celebrate the February 19 release of Pokémon TCG: Shining Fates and add some punk rock attitude to your battle lineup in your Pokémon Sword or Pokémon Shield game with a Shiny Toxtricity! Trainers can obtain a code to receive the Punk Pokémon in its Amped Form by visiting participating retailers between February 19 and March 18.

Trainers located in the US can obtain a code by using the Pokémon Pass app inside their local participating GameStop. Curbside pickup is also available. For the no-contact option, park or stand outside the front entrance of your local participating GameStop, open the Pokémon Pass app, and follow prompts for curbside pickup to receive a code for your game.

Trainers in Australia and Canada can obtain a code by visiting EB Games. For curbside pickup in Canada, Australia, and New Zealand, upon arriving to the store, please either knock on the front door or call the store to notify the staff that you have arrived and are waiting outside. Request a code from a sales associate, and they will bring one out to you.

Use these steps, along with your code, to get Shiny Toxtricity.

1. Launch your Pokémon Sword or Pokémon Shield game.
2. Select Mystery Gift on the X menu.
3. Select Get a Mystery Gift.
4. Select Get with Code/Password to connect to the internet.
5. Enter your code.
6. Watch as the gift arrives in your game. (The Pokémon will appear in your party or in your Pokémon Boxes.)
7. Be sure to save your game.

This Toxtricity is ready to get loud with two sound-based moves that are amplified by the Pokémon's Punk Rock Ability and by the Throat Spray it's holding!

Shiny Toxtricity

Level: 50
Ability: Punk Rock
Held Item: Throat Spray
Moves: Overdrive, Sludge Wave, Boomburst, Rising Voltage

Rock on with Shiny Toxtricity, and look for the Amped Pokémon in the Pokémon TCG: Shining Fates expansion!

Source: https://www.pokemon.com/us/pokemon-news/visit-gamestop-and-rock-out-with-shiny-toxtricity-in-pokemon-sword-and-pokemon-shield/