@.@ Eevees are the most annoying things to breed. Though it's probably how specific I was about the offspring that made it annoying...
I was attempting to get a Timid 31 SpAtt IV Anticipation (Mother) 31 Speed (Father) female Eevee...while not owning Black2/White2, so nature passing down is not guaranteed (B2/W2, Everstones now guarantee the Nature is passed down instead of 50%).
50% Timid,
60% Anticipation,
100% Speed IV,
1/11 SpAtt IV, or 1/9 or something, I don't know how to calculate the chance
12.5% Female
The chances of all those things being kind to me are astronomically low (games are never kind to me )...but I did eventually get one! Only took me about 4-5 hours of egg hatching, but now I have me a Dual Screens Magic Bounce Espeon .