How to get eevee in diamond?

Question

How do you get an eevee in diamond before you beat the pokemon league?

Answer 1

I think you can go to Mr. Backlot's trophy garden on certain days and catch one.

Answer 2

u can trade it with a guy named bebe in the game

Answer 3

u can get any of it's evolved forms from a friend and get a Ditto leave them at the DayCare and keep cheking with the oldman oneday  he will tell u your Pokemon wuz holding an egg when u get it from him keep the egg with u and 1 day it will hatch in 2 an eevee!