Question: how to evolve eevee into glaceon in pokemon y?
Answer: Glaceon can only be obtain by evolving eevee into glaceon in Pokemon X and in Pokemon Y by going to the Icy Rock in Frost Cavern. To get to the Frost Cavern in Kalos you need to get to Dendemill Town and head off north. You need to use the HM03 Surf to cross the river to find the Icy Rock.