You have to get an Eevee and evolve it with full friendship during the day. Try giving Eevee the item Soothe Bell, it makes the Pokemon become friendlier way faster.
No.
Yes.
get an eevee and treat it with friendship during the day
Raise evee's friendship to max level during morning time then train it one level it will become espeon.
after beating the elite 4 go to hearthome where bebe gives you an eevee, then you can get espeon by making it love you and then leveling it up during the day
try breeding it with a ditto.
Ruby Sappire Emerald Diamond Pearl Platinum Gold Silver Crystal
If you are referring to Pokemon Platinum, HeartGold or SoulSilver, the last move Espeon learns is Power Swap (Psychic, Status) at Level 78. If you are referring to earlier versions of Pokemon, the last move Espeon learns is Morning Sun (Normal, Status) at Level 71.
by happiness (umbreon and espeon) by area (leafeon and glaceon) or stone (jolteon, vaporeon and flareon)
umbreon: lvl eevee 1 lvl up with happiness at late night (not rare candy doesnt work) espeon: lvl eevee 1 lvl up with happiness at day (not morning)
Yes. All eevees can matewith all other eevees in diamond, pearl, and platinum.
your connection might be low