tweet-After becoming Champion, you will encounter “Master Trainers” who train one species of Pokemon. There is a Master Trainer for every Kanto Pokemon. You battle them 1 vs 1 with no items. Players who defeat them can leave with that Master Trainer’s title. https://t.co/ufY0P9kM62

In LGPE’s post-game, you can battle “Master Trainers” who specialize in one species of Pokemon. There is a Master Trainer for every Kanto Pokemon. You battle them 1 vs 1 to claim their title.