Pokemon Let’s Go Pikachu And Eevee’s Master Trainers
Pokemon: Let’s Go, Pikachu! and its counterpart Let’s Go, Eevee! might be aimed at a somewhat younger audience, but it seems that it will offer a fair amount of challenge for those who want it. In short, the titles will be introducing the concept of Master Trainers, each of whom will specialize in one of the original Pokemon from the Kanto region.
Some will have special requests, but most will offer battle to interested individuals once they have beaten the Elite Four. However, what is most interesting is that players will be forced to use the same Pokemon as their opponent, which will be but one of the restrictions placed upon them for said battles.
Read more here: https://www.gamespot.com/articles/pokemon-lets-go-pikachu-and-eevees-big-challenge-m/1100-6462633/