Neat little Pixie I've been testing to surprisingly effective results. Calm Mind is mentioned in the other options, but I decided to really give it a shot when I saw something that surprised me: Uxie was faster than Mesprit. I never realized this, as in my mind I always kind of stereotyped Uxie to be the "slow tank" of the three. With pretty decent Speed and high Defenses, I figured Uxie was a natural choice for a typical "Screen + Double Boost" strategy (Reflect + Calm Mind or Light Screen + Bulk Up)
http://www.smogon.com/dp/pokemon/uxie
[SET]
name: Support Sweeper
move 1: Calm Mind
move 2: Reflect / Yawn / Hidden Power Fighting
move 3: Psychic
move 4: Thunderbolt
item: Leftovers
nature: Bold
evs: 240 HP / 28 Def / 16 SpA / 8 SpD / 216 Spe
[SET COMMENTS]
<p>This set takes advantage of Uxie's phenomenal mixed defenses and decent Speed to simultaneously support the team and sweep the opposition. Psychic and Thunderbolt has good coverage in OU, as only Celebi, Magnezone, Cacturne, Steelix and Exeggutor resist the combination, and only the first two are OU. Reflect allows Uxie to support the team by reducing incoming physical attack damage by half. Reflect also gives Uxie an out against Pokemon like Tyranitar or Weavile, who don't take significant damage from the main attacks and can potentially deal massive damage with Crunch or Pursuit. If Reflect is not desired, it can be replaced with Yawn, to inflict the Sleep status on Uxie's incoming counters, or Hidden Power Fighting, to let Uxie handle Tyranitar, Weavile, Magnezone and Heatran. </p>
<p>Due to Reflect, this set works especially well in combination with other Pokemon that can boost their stats and handle common Uxie switch-ins, like Choiced Heracross or Choiced Band Tyranitar. Some potential combination Pokemon include Calm Mind Suicune, Curse Snorlax, Swords Dance Heracross, or Dragon Dance Dragonite. Whatever Uxie cannot sweep with Calm Mind and Psychic or Thunderbolt can usually be dealt with by supporting one or two other stat buffers with Reflect, making this set both a viable individual and team Pokemon.</p>
<p>The EVs are specifically designed to reach certain goals. 351 HP and 333 Defense allow Uxie to never be OHKOed by an Adamant Choice Scarf Heracross; 351 HP and 298 Special Defense allow Uxie to never be OHKOed by a Modest Life Orb Gengar; 280 Speed allows Uxie to outspeed common threats like Choice Band Heracross and Swords Dance Lucario (both Adamant); 190 Special Attack allows Uxie to OHKO 4 HP / 0 SpD Heracross after one Calm Mind and Stealth Rock damage on average.</p>
http://www.smogon.com/dp/pokemon/uxie
[SET]
name: Support Sweeper
move 1: Calm Mind
move 2: Reflect / Yawn / Hidden Power Fighting
move 3: Psychic
move 4: Thunderbolt
item: Leftovers
nature: Bold
evs: 240 HP / 28 Def / 16 SpA / 8 SpD / 216 Spe
[SET COMMENTS]
<p>This set takes advantage of Uxie's phenomenal mixed defenses and decent Speed to simultaneously support the team and sweep the opposition. Psychic and Thunderbolt has good coverage in OU, as only Celebi, Magnezone, Cacturne, Steelix and Exeggutor resist the combination, and only the first two are OU. Reflect allows Uxie to support the team by reducing incoming physical attack damage by half. Reflect also gives Uxie an out against Pokemon like Tyranitar or Weavile, who don't take significant damage from the main attacks and can potentially deal massive damage with Crunch or Pursuit. If Reflect is not desired, it can be replaced with Yawn, to inflict the Sleep status on Uxie's incoming counters, or Hidden Power Fighting, to let Uxie handle Tyranitar, Weavile, Magnezone and Heatran. </p>
<p>Due to Reflect, this set works especially well in combination with other Pokemon that can boost their stats and handle common Uxie switch-ins, like Choiced Heracross or Choiced Band Tyranitar. Some potential combination Pokemon include Calm Mind Suicune, Curse Snorlax, Swords Dance Heracross, or Dragon Dance Dragonite. Whatever Uxie cannot sweep with Calm Mind and Psychic or Thunderbolt can usually be dealt with by supporting one or two other stat buffers with Reflect, making this set both a viable individual and team Pokemon.</p>
<p>The EVs are specifically designed to reach certain goals. 351 HP and 333 Defense allow Uxie to never be OHKOed by an Adamant Choice Scarf Heracross; 351 HP and 298 Special Defense allow Uxie to never be OHKOed by a Modest Life Orb Gengar; 280 Speed allows Uxie to outspeed common threats like Choice Band Heracross and Swords Dance Lucario (both Adamant); 190 Special Attack allows Uxie to OHKO 4 HP / 0 SpD Heracross after one Calm Mind and Stealth Rock damage on average.</p>