Question: how to evolve eevee into flareon in pokemon moon?
Answer: Flareon will evolve by using a Fire Stone on it. Head off to Konikoni City on Akala Island and cross the street right by the Pokemon Center. You will there find the Jewelry Shop where you can buy the fire stones. Use the fire stone on the eevee at any time to evolve eevee into Flareon in pokemon Sun and moon.