Pokémon Sword and Shield have featured two special Gigantamax Pokémons, Pikachu, and Eevee. Eevee can be seen getting a huge fluffy mane and Pikachu becomes a large fat Pikachu. Only a few of Pikachu and Eevee will Gigantamax.
How to get special Gigantamax Eevee and Pikachu?
Now, you need to have a save file for Pokémon: Let’s Go, Eevee! or Pikachu! on your Nintendo Switch. In order to get Eevee, go with Let’s Go, Eevee! and Let’s Go, Pikachu! for Pikachu.
After you have the save file, head over to the Wild Area train station and talk to the two NPCs. The train station can be found in the Meetup Spot zone of the Wild Area. Once they know you’ve been on an adventure prior, they shall hand over the Pokémons to you.
Look at this image below for your reference.
Please note that none of these would be able to evolve. You can even borrow or rent a friend’s copy to get your Gigantamax Eevee and fat Pikachu.