Take Eevee to the daycare center with another Pokemon. And make sure that these Pokemon are compatible with each other. Such as Eevee/Ditto, or Eevee/Eevee. You should also try breeding Eevee with other Pokemon to see if there compatible or not. If they 'get along or don't like each other much' you get an egg. If they play with more Pokemon then each other try another Pokemon because you won't be getting another Pokemon.
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You breed eevee in Pokemon day care you put a boy and girl eevee there you just till they a egg or you put a girl eevee with a ditto in the Pokemon daycare. O and you spelled eevee wrong :D
maby,but the only way you can do that is if you trade with somebody a male/female eevee ,make them have the egg.
you have to breed it with a ditto and hope that you get a girl. that is also how you can get all of evee's evolved forms.
Eevee can breed with any Pokemon in the Field Egg Group and including Ditto as well.
To get more than 1 Eevee on Pokemon platinum you can migrate some from a Pokemon GBA game OR get a Ditto and breed it with your Eevee. The final way is to use an action replay/gameshark to find some more. The codes for an action replay can be found at www.codejunkies.com