In Pokémon: Let’s Go, Pikachu! and Pokémon: Let’s Go, Eevee! once players become the Pokémon League Champion they will start to encounter Master Trainers that will represent each of the Pokémon species. The master trainers will have a picture of their favorite species above their head. When you battle these trainers you will not be able to use any items. If you are able to defeat these trainers you will unlock their Master title and can be displayed during Link Battles.
There will be Master Trainers throughout the Kanto Region. Each trainer can only use their one Pokémon and you can also only use that same Pokémon and no items such as health potions. These trainers are hard because their Pokémon has harder move sets. Pokémon Let’s Go will be released only on the Switch on November 16. Which Pokémon game are you going to get? Are you going to defeat all the Master Trainers? Let me know in the comments below!