How do you get a female Eevee in Pokemon SoulSilver?

Answer 1

There are two ways to get a female Eevee in soul silver. The first is to save right before you get it from Bill and keep resetting the game until you get a female. The second is to get any Eevee from Bill and breed it with a ditto. (ditto can be caught on the same route as the daycare) You will get a female on average one out of 5 eggs or so.

I used the breeding method because you can breed a male Eevee with ditto and get more than one female for an all female Eevee team! (it does take a lot of walking to hatch those eggs though!)

You can also trade for one through the GTS and filter the settings to ask for a female eevee (it requires a Wi-Fi connection, though).

^

Just to clarify, just because this says "on average one out of 5 eggs or so" DOES NOT MEAN you will get a female 1/5 times. I just hatched my 14th egg without one female. To be honest, if you want female Eevees, you just have to work at it for many, many hours.