There are a couple of ways to catch a eevee. Sometimes in the Trophy Garden there are Eevee's, and SOMETIMES they pop out of the grass. But an easier way to get a eevee is to go to a girl next to the Pokemon center in heartrome city and use the ditto clone trick to get more eevee's. Just put the eevee and ditto in the Solaceon towns rest place. An eevee egg will hatch. Even if the eevee is evolved. I can't say how and where to catch a ditto now. I am busy. If you want to know how to catch a ditto or something go to User:Blue%20Harvyfor more information
In the underground they are very rare.
go to http://www.serebii.net/diamondpearl/newpokes.shtml
there is no eevee :(
http://www.serebii.net/diamondpearl/manaphy.shtml
You can get an Eevee from Bill in Goldenrod city.
You can find eevee in Celadon City in Kanto as a Game Corner prize.
You can find them with the Poke Radar throughout the game. http://www.serebii.net/diamondpearl/pokestore.shtml has all the awnsers
No, it isn't possible to find Eevee in Sapphire. You'll have to trade one from FireRed/LeafGreen.
The only place to find an Eevee is at Bill's house or maybe at the GTS.
You can not, you have to go to bill's house in goldenrod city to get a eevee.
As far as I know, you can only breed an Eevee with a Ditto, as I myself have been unable to find a wild Eevee. You can find a Ditto (which has no gender) after you beat the Elite Four.
You can find it from the Trophy Garden.