OKay so I have played my hand at OU for a while and decided I need to try my hand in one of the harder brackets to compete in successfully without some experience, UU. This team was a compilation of getting my butt whipped and adding members here and there that came together to form a core team that can do it's job and cause teams alot of problems, the team is mainly offensive with some thrown in defense varieties.
The Closer Look:
Arcanine @ Life Orb
Intimidate
Adamant Nature
Ev's:4 HP/ 252 Atk/ 252 Spe
Moveset-
~Extremespeed
~Flare Blitz
~Thunder Fang
~Iron Head
Usage: OKay the first thing anyone is probably thinking is.."WHAT NO STEALTH ROCK???" Well with taunt leads running around everywhere in UU I really don't see the point in it, this arcanine generally is used to shutdown opposing leads with his powerful priority extremespeed, the flinch hax of iron head on pokemon that are weak to out, and just outright damage from thunder fang and flare blitz. Depending on the battle, I generally don't preserve this guy and use him to basically deal out damage to any pokemon that switches in and just hurt whoever I can before the recoil damage or the opposing pokemon hits him hard enough to get rid of him. And..Arcanine is straight badass.
Azumarill @ Life Orb
Huge Power
Adamant Nature
Ev's: 212 HP/ 252 Atk/ 44 Spe
Moveset-
~Aqua Jet
~Waterfall
~Focus Punch
~Double-Edge
Usage: Nasty nasty pokemon, I like him mainly for his ability to deal out tons of damage with his 436 Atk + Life Orb coming from the usage of Aqua Jet which makes up for his sub-par speed. Normal+ Water provides great coverage on alot of the UU metagame and focus punch destroys predicted switch-ins no matter what they are usually. Unsuspecting blazikens, fire types in general, or fighting types blowing close combats here and there will find themselves meat to this guys destructive aqua jet.
Moltres @ Leftovers
Pressure
Modest Nature
Ev's: 248 HP/ 148 Def/ 112 Spe
Moveset-
~Substitute
~Roost
~Flamethrower
~Toxic
Usage: Shaymin's suck, as well as crobats and anything else not water typed. This guy is usually untouchable by many teams with the combination of substitute + roost making him one of those more invincible types. Roost helps get rid of that 4x rock weakness which is no easy thing to have in the UU metagame. Flamethrower and toxic provide coverage for nearly anything you will face as those things not usually hit hard by flamethrower will have to take toxic damage with flamethrowers in their face each turn they don't attack.
Crobat @ Lum Berry
Inner Focus
Timid Nature
Ev's: 4 HP/ 252 Sp.A/ 252 Spe
Moveset-
~Nasty Plot
~Heat Wave
~Air Slash
~Slude Bomb
Usage: So yeah, crobat's do suck, but also make for some of the most powerful and fastest special sweepers around. This guy can come in on a non-threat, nasty plot on the switch, and then throw around some devastating attacks to most of the opponent's team. Air Slash covers fighting types with ease, slude bomb for opposing grass types and for just being powerful enough to throw around poisons with ++ damage, and heatwave can do good damage to steel types that would normally attempt to wall the typical physical crobat.
Hariyama @ Leftovers
Guts
Adamant Nature
Ev's: 76 HP/ 252 Atk/ 180 DEf
Moveset-
~Substitute
~Ice Punch
~Payback
~Focus Punch
Usage: Just like moltres a sub-punching hariyama can find it's way easily plowing through teams that lack a phaser. He can switch in on a typical fighting type that won't really do much to him and usually bring in that all so common switch to the resident psychic type. During that phase he can sub, or if I KNOW the opponent will switch, payback to destroy it then substitute when the next one comes in. He sports icepunch that can hit crobat for 4x damaage as well as yanmega, and focus punch that does outstanding damage to alot of other pokemon. For those who expect a thick fat hariyama, will-o-wisping him is just playing into my hands as they receive a guts-boosted arsenal of attacks right in their face.
Absol@ Choice Scarf
Super Luck
Adamant Nature
Ev's: 252 Atk/4 DEf/ 252 Spe
Moveset-
~Pursuit
~Superpower
~Night Slash
~Psycho Cut
USage: Ah absol, my everyday neighborhood revenge killer. Nightslash hits most of the UU metagame for tons of damage combined with superlucks extra crit AND the extra crit stage from night slash. Psycho Cut covers fighting types who are brave enough to stay in, super power for opposing absol's(about 99% of which run life orb) and even honchkrows. Pursuit is for psychics i'm expecting to switch out and brings a nice surprise to them all the while. In short, absol is a beast of a revenge killer and an essential part to this team with his coverage, being able to net an upwards of 3 kills in some cases.
Synergy:So the first thought looking at this team would obviously be, where's the stealth rock? So far in all my victories stealth rock damage hasn't been a factor, and while it can be an absolute necessity, I haven't found it yet. The team works by covering each other well, with a few being able to stay in and stand-alone against the UU threats facing down my team. Each of them is an offensive powerhouse in their own little way, and have the ability to deal alot of damage all at once, or stall out the damage when the situation calls for it.
The Closer Look:

Arcanine @ Life Orb
Intimidate
Adamant Nature
Ev's:4 HP/ 252 Atk/ 252 Spe
Moveset-
~Extremespeed
~Flare Blitz
~Thunder Fang
~Iron Head
Usage: OKay the first thing anyone is probably thinking is.."WHAT NO STEALTH ROCK???" Well with taunt leads running around everywhere in UU I really don't see the point in it, this arcanine generally is used to shutdown opposing leads with his powerful priority extremespeed, the flinch hax of iron head on pokemon that are weak to out, and just outright damage from thunder fang and flare blitz. Depending on the battle, I generally don't preserve this guy and use him to basically deal out damage to any pokemon that switches in and just hurt whoever I can before the recoil damage or the opposing pokemon hits him hard enough to get rid of him. And..Arcanine is straight badass.

Azumarill @ Life Orb
Huge Power
Adamant Nature
Ev's: 212 HP/ 252 Atk/ 44 Spe
Moveset-
~Aqua Jet
~Waterfall
~Focus Punch
~Double-Edge
Usage: Nasty nasty pokemon, I like him mainly for his ability to deal out tons of damage with his 436 Atk + Life Orb coming from the usage of Aqua Jet which makes up for his sub-par speed. Normal+ Water provides great coverage on alot of the UU metagame and focus punch destroys predicted switch-ins no matter what they are usually. Unsuspecting blazikens, fire types in general, or fighting types blowing close combats here and there will find themselves meat to this guys destructive aqua jet.

Moltres @ Leftovers
Pressure
Modest Nature
Ev's: 248 HP/ 148 Def/ 112 Spe
Moveset-
~Substitute
~Roost
~Flamethrower
~Toxic
Usage: Shaymin's suck, as well as crobats and anything else not water typed. This guy is usually untouchable by many teams with the combination of substitute + roost making him one of those more invincible types. Roost helps get rid of that 4x rock weakness which is no easy thing to have in the UU metagame. Flamethrower and toxic provide coverage for nearly anything you will face as those things not usually hit hard by flamethrower will have to take toxic damage with flamethrowers in their face each turn they don't attack.

Crobat @ Lum Berry
Inner Focus
Timid Nature
Ev's: 4 HP/ 252 Sp.A/ 252 Spe
Moveset-
~Nasty Plot
~Heat Wave
~Air Slash
~Slude Bomb
Usage: So yeah, crobat's do suck, but also make for some of the most powerful and fastest special sweepers around. This guy can come in on a non-threat, nasty plot on the switch, and then throw around some devastating attacks to most of the opponent's team. Air Slash covers fighting types with ease, slude bomb for opposing grass types and for just being powerful enough to throw around poisons with ++ damage, and heatwave can do good damage to steel types that would normally attempt to wall the typical physical crobat.

Hariyama @ Leftovers
Guts
Adamant Nature
Ev's: 76 HP/ 252 Atk/ 180 DEf
Moveset-
~Substitute
~Ice Punch
~Payback
~Focus Punch
Usage: Just like moltres a sub-punching hariyama can find it's way easily plowing through teams that lack a phaser. He can switch in on a typical fighting type that won't really do much to him and usually bring in that all so common switch to the resident psychic type. During that phase he can sub, or if I KNOW the opponent will switch, payback to destroy it then substitute when the next one comes in. He sports icepunch that can hit crobat for 4x damaage as well as yanmega, and focus punch that does outstanding damage to alot of other pokemon. For those who expect a thick fat hariyama, will-o-wisping him is just playing into my hands as they receive a guts-boosted arsenal of attacks right in their face.

Absol@ Choice Scarf
Super Luck
Adamant Nature
Ev's: 252 Atk/4 DEf/ 252 Spe
Moveset-
~Pursuit
~Superpower
~Night Slash
~Psycho Cut
USage: Ah absol, my everyday neighborhood revenge killer. Nightslash hits most of the UU metagame for tons of damage combined with superlucks extra crit AND the extra crit stage from night slash. Psycho Cut covers fighting types who are brave enough to stay in, super power for opposing absol's(about 99% of which run life orb) and even honchkrows. Pursuit is for psychics i'm expecting to switch out and brings a nice surprise to them all the while. In short, absol is a beast of a revenge killer and an essential part to this team with his coverage, being able to net an upwards of 3 kills in some cases.
Synergy:So the first thought looking at this team would obviously be, where's the stealth rock? So far in all my victories stealth rock damage hasn't been a factor, and while it can be an absolute necessity, I haven't found it yet. The team works by covering each other well, with a few being able to stay in and stand-alone against the UU threats facing down my team. Each of them is an offensive powerhouse in their own little way, and have the ability to deal alot of damage all at once, or stall out the damage when the situation calls for it.