[EonX-]

How this hasn't been put into the OP I'm not sure I want to know:

Uxie @ Leftovers
Trait: Levitate
EVs: 252 HP / 80 Def / 40 SDef / 136 Spd
Calm Nature (+SDef, -Atk)
- Stealth Rock
- Thunder Wave / Yawn
- Psychic
- U-turn

Role: Hazard User

What it Does: As most good players know, Uxie it the ultimate team supporter in RU. It can be EVed in so many ways and has quite a great support movepool. This is Uxie's general Utility support set that allows it to check and counter the most threats. Stealth Rock is great on Uxie. With it's great bulk and decent Speed, Uxie will rarely have a problem in setting up SR at some point in the match. Next is your status move of choice. Thunder Wave cripples faster threats such as Moltres, Sceptile, and Kabutops who may try to break through Uxie or Spin on Uxie. Yawn is a perfectly viable move and will pretty much stop any setup sweeper cold. It's also a great way to get a teammate in safely for a free chance to setup. Psychic allows Uxie to 2HKO Nidoqueen, one of the biggest offensive threats in the tier. U-turn is great on Uxie as it allows the pixie to lure in checks and counters and allow you to start to gain momentum. The given EVs is just one spread Uxie can adopt, but this is the most reliable one as Uxie is a superb defensive answer to Nidoqueen, one of the tier's most feared attackers. First off, 136 Speed EVs are used to outrun Adamant Kabutops. 252 EVs are invested into HP to give Uxie overall bulk while 40 Special Defense EVs and a Calm nature allows Uxie to avoid the 2HKO from Modest LO Nidoqueen's Sludge Wave after SR. The rest of the EVs are placed in Defense to let Uxie take random physical hits better, especially from Fighting types.

Good Teammates: This could be really long as Uxie can work on virtually any type of team, but I'll try to keep it from getting too long. Fighting types and Dark types should be your first considerations as they can come in on the Dark and Ghost types Uxie doesn't want to stay in on. Gallade gets a Justified boost from Dark type moves and loves the paralysis support Uxie brings, lessening the need for it to use Shadow Sneak. Uxie can also come in on priority users trying to stop Gallade's sweep. Escavalier resists all 3 of Uxie's weaknesses and bashes in the heads of pretty much everything bar Steel types with Megahorn or Iron Head. Lanturn is a solid option as it can handle Moltres with ease and can cure Uxie of bothersome status it may pick up with Heal Bell. Lanturn can also utilize Thunder Wave effectively, allowing Uxie to use Yawn more freely. Outside of a Steel type and/or Fighting type, Uxie will fit onto pretty much any standard offensive team since it can build momentum with U-turn, slow faster threats with paralysis (or provide setup opportunities with Yawn) and check many powerful threats in the tier such as Gallade and Nidoqueen. Uxie generally supports the team instead of the team supporting it (outside of maybe a Steel or Fighting type)

What Counters It: Almost any Dark type will scare Uxie out. So, Absol, Spiritomb, Crawdaunt, and Drapion are the big ones. Fast Taunters such as Aerodactyl and faster variants of Qwilfish will prevent Uxie from supporting the team. However, a well-timed Psychic will end Qwilfish on the spot. Due to Uxie's stellar defenses and access to U-turn, it will be difficult to straight up counter Uxie. However, its lack of recovery will ultimately be its downfall as repeated beatings will take their toll. It should be noted that slower threats such as Druddigon and Escavalier don't care about paralysis, don't take much from Psychic, and can blast through Uxie with powerful boosted STAB moves.

Additional Info: Get comfortable, because this is where I explain all of the other support options Uxie can viably run on this set. Heal Bell is the most notable as this will let Uxie act as a cleric. Memento can be like a pseudo-U-turn. Uxie will sacrifice itself, but will provide a near-guaranteed setup opportunity for a sweeper like Crawdaunt or Gallade. Toxic screws over walls pretty badly if you're having trouble breaking through them. If Taunt users are annoying you, Magic Coat can be used to make the Taunt backfire on the user. If cleric support is being run, Uxie has access to Rest and Sleep Talk to form the RestTalk recovery method. Keep in mind that all of these moves, bar Heal Bell and Memento are highly situational and the given moveset is generally better. SR and U-turn should always be found on Uxie's moveset and the most interchangeable move is the 2nd slot. As for the EV spread, Uxie can shift EVs around accordingly to better meet the needs of a team. If outspeeding Adamant Kabutops isn't a priority, Uxie can drop its Speed EVs down to 104. This should be the bare minimum amount as this lets Uxie outspeed Modest max Speed Nidoqueen. You can shift the 80 Defense EVs around if you like. They'll see the most use in Special Defense to allow Uxie to handle more special attackers. You can run a Bold nature and move Uxie's Special Defense EVs to Defense to better handle Fighting types. If outspeeding Moltres and Lilligant is a priority, a Timid nature can be used with max Speed. However, keep in mind that the given EV spread is generally more efficient and should only be modified should your team require it.