How do you turn eevee into an ice eevee?

Answer 1

You level the eevee up on a high-friendship level near an ice rock, same for leafeon near a mossy rock (there is one in the eterna forest and an ice rock in Mt.Coronet)

The "ice eevee" is glaceon, and he evolves with leveling up next to an icy rock near a house at either route 216 or route 217 i don't remember which one. That's the same getting leafeon only you level up an eevee in the eterna forest to get him.

Anyways, you have Eevee, and want to turn it into Glaceon, right? Because really, there is no "ice eevee". There is an ice EVOLUTION of eevee, but no ice Eevee. >.>. OK? OK.

Now, go to Snowpeak, go into the grass, I believe you have to go down South a bit (Been ages since I played Dia/Pearl/Plat), but not too far South. I believe you then go right, and there should be the Icy rock or whatever it's called there. Level up your Eevee by that rock, and it should evolve into Glaceon with just one level.