While Espeon is certainly nothing to laugh at with its Magic Bounce ability, the Dream World metagame provides many threats, such as Genesect and Excadrill, that give it a hard time. However, that is not to say that the Sun Pokemon is unusable. In fact, given the correct support, Espeon can really shine, and it has the potential to sweep whole teams. Espeon can also be used as a decent supporter thanks to its large supporting movepool and high base Speed. While the big guns of the Dream World might harass it, Espeon should never be underestimated unless one wants to get swept.
Espeon's Magic Bounce ability makes it a great supporter by letting it bounce back Spore, Stealth Rock, and Thunder Wave from the likes of common Pokemon such as Breloom, Ferrothorn, and Thundurus respectively. Additionally, with its high Speed, Espeon can set up dual screens with ease. This can aid sweepers such as Garchomp, Breloom, and Excadrill immensely, as it gives them an opportunity to boost their stats to sky-high levels. Espeon's third move depends on preference, as Psychic and Psyshock will do minor damage to Blissey and Chansey regardless. However, one should note that Psychic will hit Gliscor much harder than Psyshock. Hidden Power Fire gives Espeon coverage against some common threats in the metagame, namely Genesect, Ferrothorn, and Scizor. Baton Pass carries utility, though, as it allows Espeon to escape common Pursuit users such as Tyranitar, who have the ability to ruin Espeon's day.Team Options & Additional Comments >>>
Espeon's access to Baton Pass and its high base Speed give it the ability to run a good Baton Pass set. While one might question what Espeon has over any other user of Baton Pass, the answer is simple: Magic Bounce. Magic Bounce allows Espeon to avoid being phazed by Roar and Whirlwind, bounce back status moves such as Spore, and prevent fast Taunts; it simply allows Espeon to set up easily, an advantage over other Baton Pass users. Calm Mind works very well here, as Espeon can use the boosts to sweep when given the chance. However, more often than not, Espeon will simply pass the boosts on to another sweeper, that will then take care of business. Psychic is a solid STAB move, though Stored Power is also an option because Espeon might be able to rack up multiple boosts. If one uses Espeon on a dedicated Baton Pass team, Hidden Power Fire is the superior option because it allows Espeon to possibly OHKO Genesect if Espeon is at +1 Speed. However, Hidden Power Fighting allows Espeon to hit the ubiquitous Tyranitar and other Dark-types that would otherwise wall this set, so it's crucial to Espeon's success.Team Options & Additional Comments >>>
Due to its poor movepool, Espeon has a slim set of other viable options. While it can run a Calm Mind set that capitalizes on its boosts and attempts to sweep, Tyranitar, Genesect, Thundurus, and Excadrill are all so common that this is never a truly viable option unless given major support. In the sun, Espeon can run Morning Sun to heal more than half of its HP back, but with the ubiquity of Tyranitar and Politoed, Morning Sun will often be a waste of a moveslot. Judging by Espeon's stats alone, it would seem to be an excellent Choice Scarf or Choice Specs user, but because its coverage is severely limited, Espeon is usually best running simple sweeping or supporting sets.
Checks and Counters
While Espeon cannot be phazed out like most sweepers that try to garner boosts, its downfall stems from its low Defense stat. Threats such as Tyranitar and Scizor can both put Espeon in a checkmate position, the former due to STAB Pursuit and the latter because of both Bullet Punch and Pursuit. While Espeon can pack the correct Hidden Power to take on each of these threats, it cannot take repeated hits from either, and will be worn away quickly by passive damage from entry hazards. Genesect makes a fine check to Espeon because it can come in on a Calm Mind or Psychic-type STAB attack and grab an Attack boost from Download. It should be noted that even with minimal investment in Attack, Genesect will always OHKO Espeon with U-turn.
Garchomp can switch in on most of Espeon's attacks due to its great bulk and do massive damage with either of its STAB attacks. Excadrill also does well because it outspeeds and OHKOes Espeon with Earthquake when used in sand. However, one should be wary of Hidden Power Fighting or Hidden Power Fire, because losing HP to an attack on the switch-in is unfavorable.
Shadow Tag Chandelure presents Espeon with a unique threat, especially if Chandelure is equipped with a Choice Scarf. If it manages to come in unscathed, Chandelure can simply use Shadow Ball to OHKO unboosted Espeon or even revenge kill Espeon if weakened sufficiently.
While Espeon cannot be phazed by normal means such as Roar and Whirlwind, one can use Circle Throw and Dragon Tail to limit Espeon's fun. However, one must be wary of a miss from the aforementioned moves, as it can spell doom.