Team at a glance:
Hippopotas(female) @ focus sash
EVs: 252 HP, 252 Def, 4 SpD
Nature:Bold
Abilitly: Sand stream
~Stealth Rock
~Attract
~Toxic
~Sleep Talk
Hippopotas is the only real option for a lead on a UU sand team. I gave it focus sash so it can at least get stealth rock up. Sleep talk helps against sleep leads. Setting up sandstorm and rocks are the only real goals of this, but toxic and attract can be useful against pokemon who don't just kill it. It's female because almost everyone leaves their pokemon as males.
Regirock @ choice band
EVs: 252 Atk, 252 HP, 4 Spe
Nature: Adamant
Ability: Clear body
~Stone Edge
~Earthquake
~Ice Punch
~Explosion
In sandstorm, this thing has great natural defenses. Maxing HP and Atk makes this a formidable bulky sweeper with a choice band. Stone edge is a strong STAB move, earthquake and ice punch give great coverage, and explosion brings down a lot of things once regirock is worn down. The defenses of this set really make it easy to bring in, and it offensive power is very threatening.
Cradily @ Leftovers
EVs: 112HP, 252 Atk, 144 Def
Nature: Adamant
Ability: Suction cups
~Swords Dance
~Stone Edge
~Seed Bomb
~Recover
Another physical sweeper, but this one sets up with swords dance instead. Its attacks are its STAB moves, which so far have proven to work decently. However, I am considering switching seed bomb to earthquake. This thing can take some hits, so it is pretty easy to get at least one swords dance, and recover emphasizes its defensive ability. Suction cups means it can't be phazed out, which is always a plus. The main drawback to this is its speed, leaving it easy prey for a status inducer. (Paralysis doesn't matter much, but burn, sleep, and toxic can cause major problems.)
Gastrodon @ Leftovers
EVs: 212 HP, 252 Def, 44 SpA
Nature: Relaxed
Ability: Sticky Hold
~Surf
~Ice Beam
~Earthquake
~Recover
I originally picked this because I Wanted a bulky water that didn't take damage from sandstorm, and it can use recover. I didn't think it could do much, but I've found out that it actually works quite well. It's good typing, High HP, and recover make it hard to kill easily. It covers quite a few types with its moves. Although it is not very powerful, its combination of survivability and coverage allow it to beat many other pokemon one on one. Its biggest weakness is toxic. (and grass, but its usually pretty obvious when someone has HP grass, and it's not the most common attacking type either.)
Camerupt @ Life Orb
EVs: 4HP, 252 SpA, 252 Spe
Nature: Modest
Ability: Solid Rock
~Rock Polish
~Fire Blast
~Earth Power
~HP Grass
This guy completes the popular UU core of fire, water, and grass. Getting Him in is not easy, but if I can pull off a rock polish while the opponent switches, It can deal some good damage. The STAB moves are very useful, and HP grass is the best way to deal with water pokemon, beacuase Gastrodon and Quagsire are more common than Mantine. There isn't a whole lot to say about this guy, except that Azumaril with its Aqua jet completely destroys it, which isn't good, considering how common that is in UU. Probably the first pokemon I would change on my team. It's good, but it's just not supported well by my other pokemon.
Steelix @ Chesto Berry
EVs: 252 HP, 4 Atk, 252 SpD
Nature: Sassy
Ability: Rock Head
~Curse
~Rest
~Gyro Ball
~Earthquake
Max HP and Special defense, while curse bolsters its attack and defense. He also has a speed IV of 0, so Gyro ball hits as hard as possible. Two decent STAB moves powered up by curse and the free heal provided by the rest chesto combo make this quite an effective bulky sweeper. I also use this to absorb status. Not really much to say about this, it takes hits well, dishes out damage after some set up, and can heal itself.
Well, there's my team. It's relatively new, but so far it has been working pretty well. There are however some problems. The biggest problem is that there are 3 water weaknesses (4 if u count hippopotas, but I don't really care about him), and no one to resist them. This reason alone makes me consider using Quagsire over Gastrodon, as water absorb could really come in handy, Although I have found Gastrodon quite useful. I also have 3 fighting and ground weaknesses, but Regirock can still take the hits and hit back hard. There is also the lack of special offense. Once camerupt goes down, all I have left are Gastrodons surf and ice beam, which aren't really meant to sweep. There are also 3 grass weaknesses, with no resists, but those aren't very common, and my 3 that take them neutral can come in and set up decently. I was thinking about switching camerupt for cacturne, as he could take water and grass decently, and also become very annoying with his evasion boost. If I did, I would probably use a choice specs set, because my team is lacking in the special attack department, and it would be more unexpected than the common sub-punch set.
Hippopotas(female) @ focus sash
EVs: 252 HP, 252 Def, 4 SpD
Nature:Bold
Abilitly: Sand stream
~Stealth Rock
~Attract
~Toxic
~Sleep Talk
Hippopotas is the only real option for a lead on a UU sand team. I gave it focus sash so it can at least get stealth rock up. Sleep talk helps against sleep leads. Setting up sandstorm and rocks are the only real goals of this, but toxic and attract can be useful against pokemon who don't just kill it. It's female because almost everyone leaves their pokemon as males.
Regirock @ choice band
EVs: 252 Atk, 252 HP, 4 Spe
Nature: Adamant
Ability: Clear body
~Stone Edge
~Earthquake
~Ice Punch
~Explosion
In sandstorm, this thing has great natural defenses. Maxing HP and Atk makes this a formidable bulky sweeper with a choice band. Stone edge is a strong STAB move, earthquake and ice punch give great coverage, and explosion brings down a lot of things once regirock is worn down. The defenses of this set really make it easy to bring in, and it offensive power is very threatening.
Cradily @ Leftovers
EVs: 112HP, 252 Atk, 144 Def
Nature: Adamant
Ability: Suction cups
~Swords Dance
~Stone Edge
~Seed Bomb
~Recover
Another physical sweeper, but this one sets up with swords dance instead. Its attacks are its STAB moves, which so far have proven to work decently. However, I am considering switching seed bomb to earthquake. This thing can take some hits, so it is pretty easy to get at least one swords dance, and recover emphasizes its defensive ability. Suction cups means it can't be phazed out, which is always a plus. The main drawback to this is its speed, leaving it easy prey for a status inducer. (Paralysis doesn't matter much, but burn, sleep, and toxic can cause major problems.)
Gastrodon @ Leftovers
EVs: 212 HP, 252 Def, 44 SpA
Nature: Relaxed
Ability: Sticky Hold
~Surf
~Ice Beam
~Earthquake
~Recover
I originally picked this because I Wanted a bulky water that didn't take damage from sandstorm, and it can use recover. I didn't think it could do much, but I've found out that it actually works quite well. It's good typing, High HP, and recover make it hard to kill easily. It covers quite a few types with its moves. Although it is not very powerful, its combination of survivability and coverage allow it to beat many other pokemon one on one. Its biggest weakness is toxic. (and grass, but its usually pretty obvious when someone has HP grass, and it's not the most common attacking type either.)
Camerupt @ Life Orb
EVs: 4HP, 252 SpA, 252 Spe
Nature: Modest
Ability: Solid Rock
~Rock Polish
~Fire Blast
~Earth Power
~HP Grass
This guy completes the popular UU core of fire, water, and grass. Getting Him in is not easy, but if I can pull off a rock polish while the opponent switches, It can deal some good damage. The STAB moves are very useful, and HP grass is the best way to deal with water pokemon, beacuase Gastrodon and Quagsire are more common than Mantine. There isn't a whole lot to say about this guy, except that Azumaril with its Aqua jet completely destroys it, which isn't good, considering how common that is in UU. Probably the first pokemon I would change on my team. It's good, but it's just not supported well by my other pokemon.
Steelix @ Chesto Berry
EVs: 252 HP, 4 Atk, 252 SpD
Nature: Sassy
Ability: Rock Head
~Curse
~Rest
~Gyro Ball
~Earthquake
Max HP and Special defense, while curse bolsters its attack and defense. He also has a speed IV of 0, so Gyro ball hits as hard as possible. Two decent STAB moves powered up by curse and the free heal provided by the rest chesto combo make this quite an effective bulky sweeper. I also use this to absorb status. Not really much to say about this, it takes hits well, dishes out damage after some set up, and can heal itself.
Well, there's my team. It's relatively new, but so far it has been working pretty well. There are however some problems. The biggest problem is that there are 3 water weaknesses (4 if u count hippopotas, but I don't really care about him), and no one to resist them. This reason alone makes me consider using Quagsire over Gastrodon, as water absorb could really come in handy, Although I have found Gastrodon quite useful. I also have 3 fighting and ground weaknesses, but Regirock can still take the hits and hit back hard. There is also the lack of special offense. Once camerupt goes down, all I have left are Gastrodons surf and ice beam, which aren't really meant to sweep. There are also 3 grass weaknesses, with no resists, but those aren't very common, and my 3 that take them neutral can come in and set up decently. I was thinking about switching camerupt for cacturne, as he could take water and grass decently, and also become very annoying with his evasion boost. If I did, I would probably use a choice specs set, because my team is lacking in the special attack department, and it would be more unexpected than the common sub-punch set.