Question: how to make eevee evolve into vaporeon pokemon sun?
Answer: How To Evolve Eevee Into Vaporeon. Put simply, you're going to need to expose Eevee to a Water Stone to get a Vaporeon. As for where you can nab the special stone, you can find it in Route 8 in the water south of the small island, or you can just buy one in Konikoni City for 3,000 credits or win some via Poké Pelago.