Espeon @ Leftovers
Timid Nature
EVs: 200 HP / 188 Spd / 122 Sp.Def
- Calm Mind
- Psychic
- Baton Pass
- Hidden Power Fighting / Hidden Power Ice / Shadow Ball / Substitute
Calm Mind passing set. HP Fighting is your best option against Tyranitar, however, this move may not ensure a 2HKO, so make sure it's weakened first. HP Ice grants you protection against Garchomp, while Shadow Ball hurts other Psychic types. It really depends what your team requires most in the last slot. Substitute can also work in the last slot, that is, if you find it necessary to pass subs to its teammates.
Espeon @ Leftovers
Timid Nature
EVs: 252 Sp.Atk / 252 Spd / 4 HP
- Calm Mind
- Psychic
- Subsitute / Reflect
- Hidden Power Fighting / Grass Knot
This is more of a sweeper set. Only real problem I find with using this one is that Pursuit can really screw Espeon over if you don't have Baton Pass, however, Reflect and Substitute are options added here so it could solve the problem. Hidden Power Fighting is most recommanded here, but Grass Knot is acceptable if you can't get obtain the right HP.