You can't but if you want to evolve eevee there is a shop at Gateon Port where you can evolve eevee into 1 of the 5 POKEMON that eevee evolves into.
Hope This Helps
There is one somewhere in a chest on the SS Libra
You get it in the SS Libra, so make sure you get all the things there!!
You find one in the ss libra.
Only once you can get this, in gateon port to the west is a shop inside a sailor is there he will notice your evee and will let you take a stone or item to evolve it take the fire stone then use it to evolve your evee to flareon.
Just use it in battle a lot. I think that there is also a special stone or something similar to the fire and thunder stone that can evolve it right away.
Only once can you get this: Go to gateon port go west until you find a shop go in and talk to the sailor he will let you take an item take the fire stone then use it on evee to turn it into flareon.
You can receive one from the sailor at gateon port in the parts shop also you find one somewhere in the game.
Use a Fire Stone. Doesn't have to reach any level, just use the stone! It's the same with other pokemon, I.e. Gloom, Poliwhirl, Pikachu, Meowth, Nidoran (either gender), and Vulpix to name a few.
Yes you can you get it in the beginning of the game at gateon port you have to talk to the shopkeeper in the shop which is on the left side of gateon port
You get the Fire Stone in the very beginning (then again it's an option..) When you first enter the Parts Shop in Gateon Port. Lol, Talk to the Sailor that rambles on and on about "stones" Then you get a choice of which stone you want, choose wisely though. I picked the Thunderstone and REGRETTED it because later on you capture a shadow Vulpix that apparently needs a Fire Stone in order to evolve. Lame, I know. Hope This Helped! =^.^=
inside the hull of the ss libra check all of the poke,boxes and youl find it inside one of them
pick it in the store that you go to to deliver the package that's the only way i know other than finding one in a pokebox