Question

How do you get G-MAX Pikachu?

Answer 1

From May 11, 2020 to May 18, 2020, it was possible to find G-Max Pikachu in Max Raid Dens. Another way to get G-Max Pikachu is to use Max Soup on it. If you have the Isle of Armor DLC, there is an item called Max Soup that can be applied to Pikachu (and other Pokemon with G-Max forms) that gives it it's G-Max form.

Max Soup and the Let's Go! Pikachu prize are currently the only ways to obtain G-Max Pikachu.

Answer 2

You visit a NPC in the train station. You can only get it if you played Let’s Go Pikachu! There are two people in the train station. One will give you Eevee and one will give you Pikachu. Claim it from them and now you have one. Hope this helped!

Comments

Actually, that isn't the only way. I know you can find it in the wild because I play Let's Go Eevee yet I still found one.