So, it's done. I am generally very, very happy with Jolteon, Magnezone and Espeon. Great stats and moves. Leafeon I'll take too.
(This will be a long paragraph and might seem quite confusing, but keep going!)
The togekiss and umbreon are still at too early a stage to tell their potential. What I'd like to do is take a clone of them both (I can clone them quickly and return the originals) and train them up myself to lv. 100 (won't take too long). Meanwhile ofcourse I won't at any point trade them to ANYONE. When they're at lv. 100, if they're good I'll reward you with 2 more free ev trained pokemon (of your free choice). For taking the two clones (Umbreon, Togekiss) off your hands I'll give one ev trained pokemon from the ones you wanted. So this is like an investment trade, you'll get rewarded with 3 ev'd for 2 ev'd if they're good. If they're not good I'll release them so you know I can't trade them and you'll still have the 1 ev'd poke I gave you for them two.
You said Mismagius is your Umbreon's Partner so I'll take it too.
Summary:
Jolteon, Magnezone, Espeon, Leafeon, Umbreon, Togekiss and Mismagius
for
Lv. 87 Timid Mewtwo Ev trained (Stats: From HP: 292/ 195/ 166/ 345/ 162/ 316
w/ Calm Mind, Taunt, Fire Blast, Thunder (can be taught ice beam, shadow ball at your request)
and
Forretress
Metagross
Forretress
Ninetales
Arcanine
EDIT: Can you tell me the IV's of Umbreon and togekiss?