10 Postgame Challenges In Pokémon Sun And Moon
7. Beat The Eevee Trainers
If you fly to Royal Avenue and talk to the veteran cashier, he will tell you about eight Pokémon trainers that he wants you to meet. These trainers are scattered throughout the region and each of them uses a different Eeveelution.
Talk to the veteran again and he will give you clues about all of the trainers’ locations. Okay, so you don’t have to be Sherlock Holmes to figure them out, but it’s a fun little side-quest and you’ll get a pretty amazing reward for completing it.