I bred over 100 eevees got lucly in surprise trade and got several japanese eevees with "best" ivs on most stats and had to get a ditto to start breeding and probably took about 2 or 3 boxes worth of eevees to get a shiny. Ended up giving probably 2.5 boxes worth of eevees away on surprise trade. Surprisingly somebody sent a really good ivd dreepy or whatever. And I saved the good dreepys and attempted to breed more with a destiny knot and the ivs were okay to good. And gave some away and just kept the best ones gonna try again to breed for a shiny buts so time consuming. i find jist riding bike back n forth and sending eggs to box than enmass dropping eggs in my current belt and riding a bike back n forth on bridge with a flamebody pokemon in my party end up hatching all 5 quickly. Than deposit. And withdraw another set of eggs and go back n forth and boom. End up with good ivs but no shiny. Ended up giving most away and saving a handful kept female breeders aswell same with eevees. So new and current players got blessed with mostly good ivd eevees and dreepys.