No you cant because once eevee evolves it cant anymore. Hope this helped!
Evolve Eevee during the day
So far: Flareon. Use fire stone Vapreon.Use Water stone Jolteon. Use Thunder stone Leafeon. lvl up in Route 217 Glaceon. Lvl up in eterna forest Umberon. lvl up at night with high friendship Espeon. lvl up day with high friendship
If you want Eevee to evolve into Espeon then train it during the day, other way 'round for umbreon (On LGFR you need the National Dex)
Eevee has 7 evolutions who are Vaporeon, Flareon, Jolteon, Umbreon, Espeon, Leafeon and Glaceon. To evolve Eevee into the water type Vaporeon, use a Water Stone on it however in order to evolve it into the fire type Flareon you need to use a Fire Stone on it and for the electric type Jolteon use a Thunder stone on it. Eevee will evolve into the dark type Umbreon if it's really happy and if you level it up at night and Eevee will evolve into the Psychic type Espeon if it's really happy and you level it up in the day time. For Leafeon, just level it up near the Moss Rock in Eterna Forest and it'll evolve into the grass type Leafeon and in order for Eevee to evolve into the ice type Glaceon you need to level it up near the Ice Rock which is near Snowpoint City.
Evee will evolve to espeon if it has max friendship with its trainer and if its morning.
There is no such thing as Rockeon. There are only Flareon, Jolteon, Vaporeon, Espeon, Umbreon, Leafeon and Glaceon.
it evolves into vaporeon , jolteon , flareon , espeon, umbreon, leafeon ,glaceon.
Espeon, Umbreon, Glaceon, Leafeon, Flareon, Vaporeon, and Jolteon
eevee can evolve into vaporeon, jolteon, flareon, espeon, umbreon, leafeon, and glacieon.
Flareon can't evolve you can only evolve eevee into: /flareon/jolteon/vaporeon/leafeon/glaceon/umbreon/espeon
Eevee has seven evolutions. It can evolve into Glaceon, Leafeon, Vaporeon, Flareon, Espeon, Umbreon, or Jolteon.
nothing eevee can evolve in to one of seven things: jolteon, espeon, umbreon, flareon, glacion, leafeon and vapreon
There are 7 ways to evolve Eevee. Eevee's evolutions are Flareon, Jolteon, Vaporeon, Espeon, Umbreon, Leafeon, and Glaceon.
by happiness (umbreon and espeon) by area (leafeon and glaceon) or stone (jolteon, vaporeon and flareon)
If you mean how to make it evolve: In SoulSilver and HeartGold, you can get an Espeon by training your Eevee in the day time, and at a certain lvl. it will evolve into Espeon. To get Umbreon, you do the same thing, except you train it at night (it may take a couple tries when it's going to evolve to get it to evolve into Umbreon if you've trained it in the day time, too). To get Jolteon, use a thunder stone. Flareon, fire stone. Vaporeon, water stone. To get Leafeon and Glaceon, trade to Diamond, Pearl, or Platinum, and for Leafeon, go to the forest after the 'Flower Town' and make it go up a lvl. and it should evolve into Leafeon. For Glaceon, go to the snowy rout, and make it go up a lvl. and you get a Glaceon. Then trade back to get it in HeartGold/SoulSilver.
Jolteon cannot evolve into Leafeon. Eevee can evolve into leafeon, but not Jolteon. You have to make eggs to get more eevees so you can evolve them.
You cannot evolve Leafeon.