Ok, this is basically the same team I used on my platinum cartridge, I never really played anyone else competitively until I got wireless internet this year, but i've played myself on two DS's hardout for years and years.
I've tweaked it slightly for BW2 and have enjoyed much success with this team on the ladder.
HEAVYMETAL @ Leftovers
Calm nature
252 Hp / 16 Def / 220 SpDef / 20 Spe
Pressure
Stealth Rock
Flamethrower
Dragon Tail
Draco Meteor
I usually use this guy as my lead, and it gets rocks up vs most anything. The 16 def evs are there to ensure non-crit superpowers from Deoxys-A does not OHKO, and the speed evs are basically speed creep to beat other base 90 leads with no/little investment in speed.
Dragon tail is awesome, especially if i'm vs some noob that just sword dances straight away or calm minds straight away. Quite often i will get up rocks and use dragon tail quite a few times to rack up damage before dialga goes down. Flamethrower > fire blast simply because flamethrower still roasts ferro/forry and thats all i really need it for, and i like knowing I have a reliable move to hit them with. Draco meteor just for a strong stab attack, and because it's too good not to have.
A few opposing leads annoy me. Deoxys-S with taunt is a pain, once it taunts me, i just switch to forretress and rapid spin away their hazards or gyro ball. Darkrai can stop stealth rock getting up with dark void, but I still let dialga absorb the sleep then switch to scarf Kyogre, which noramlly comes in on the nasty plot. About 70% of the time it's some noob that just stays in and loses his darkrai to a OHKO water spout, but darkrai with focus sash or darkrai that uses thunder wave/substitute on the anticipated switch give me headaches. I just stay in vs groudon and use rocks, sometimes groudon ohkos with earthquake, but it is rare to run into such an offensive groudon lead. Most times groudon expects the switch and uses rocks anyway, and this dialga doesnt really care about being twaved. Vs ferro leads i SR first, and often i see them using protect 1st turn to scout out for the fire move. 2nd turn I use flamethrower :) Sometimes I don't even want to roast ferro, as forry just trolls it hard and gives me an ideal way to set up spikes and t spikes and just rapid spin away ferros hazards (smart rapid spinning here is key, because of iron barbs, dont rapid spin until it has 3 layers up, and look to see if they have a spin blocker).
LEVIATHAN @ Choice Scarf
Modest nature
252 SpAtt / 252 Spe / 4 Hp
Drizzle
Water Spout
Surf
Ice Beam
Thunder
In my opinion scarf kyogre should be on almost every team because it is the best pokemon in the metagame, and has been since its introduction in ruby/sapphire. I reliably revenge mewtwo and darkrai, and late game after the opposing team has been weakened through hazards and i've removed counters (palkia/ferrothorn/latias/gastrodon/arceus grass) this thing cleans up. If I suspect palkia will be switching in immediately expecting a water attack I thunder from the get go. Waterspout OHKO's shaymin sky after rocks.
I used to have the evs tailored so it just outsped mewtwo and had more bulk, but now I realise speed tying with other modest scarf ogres and outspeeding various deoxys is more important. This guy packs an immediate punch and nails teams if they have no counter.
SCARAB @ Leftovers
Sassy nature
252 Hp / 12 Def / 244 SpDef
0 speed ivs
Sturdy
Gyro Ball
Spikes
Toxic Spikes
Rapid Spin
My fav pokemon. This guy is awesome. If you know how to play, this guy eats ferrothorn alive. I can always tell im playing a noob if he keeps his ferrothorn in on this guy. He resists outrage and I quite often switch into outrage and just rack up hazards. Gyro ball hurts mewtwo/darkrai/deoxys/terrakion/kyurem/frosslass and the latis to a degree, and basically anything that uses taunt.
Looking at the other team in team preview, I try to decide which hazards would be more beneficial. If they have a lot of steels i opt for spikes first, if their kyogre counter is gastrodon or grass arceus I opt for toxic spikes. If their team is laden with grounded sweepers like mewtwo and darkrai I aslo opt for toxic spikes 1st.
This guy can come in on outrage, lugia, ferrothorn, the pink blobs, draco meteor, choice locked attacks and deoxys (esp after superpower/psycho boost which seems to be really common) and set up hazards. Sturdy helps it out a lot.
GUARDIAN @ Leftovers
Bold nature
252 Hp / 8 def / 248 Spe
Multiscale
Whirlwind
Toxic
Substitute
Roost
This guy is a beast. This is THE lugia set to use, anything else is retarded as far as i'm concerned. With hazards down I can just whirlwind, sub and roost all day to inflict major pain on the other team.
Whirlwind > dtail on lugia to phaze through sub and 100% accuracy. Dtails advantage is that it can work through taunt, but with lugias lack of attack and lack of stab dtail does miniscule damage that isn't even worth factoring into this decision. I can't stress enough how important it is to phaze through sub.
The speed evs are enough to reach 318, 1 more than max speed base 95s, and 90% of the time I outspeed opposing lugia, which wins you the mirror. I sub first anticipating their toxic (opposing whirlwind is a bitch here) then I toxic them. A poisoned lugia is a dead lugia, so sub is really awesome. I use sub to stop twave from groudon too. Groudon finds it very to hard to break lugias sub, only stone edge breaks it in one hit. Groudon plays a dangerous game if it tries to stay in on lugia (unless groudon packs the rare roar) because lugia can sub and roost in the face of stone edge until it misses and then u have sub up for free.
If even scarf kyogre switches into this lugia while lugia has a sub up, lugia will win one on one through toxic damage and spamming roost/sub. Slower kyogres never beat it.
The great wall provides insurance against many phys threats, most notably extreme killer arceus and rayquaza, and it nails noobs that use ninjask. I've raped whole teams with this guy.
DOOM @ Spooky plate
Adamant nature
4 Hp / 252 Att / 252 Spe
Multitype
Extreme Speed
Brick Break
Swords Dance
Shadow Force
My spin blocker and almost 'mandatory' arceus forme (if you want your team to be the best it can be then you have to use an arceus).
Used to be bold nature with judgement and will o wisp, but I got raped by a guy using this version and have used it with great success ever since.
Switches in on forrys thinking I have no spin blocker(You cant tell arceus is ghost in preview) and Sword dances up. Forrys dumb enough to stay in just got their team swept. It is nice to have a set upper other than forry on my team to take advantage of opportunities to wreak havoc (opponents used superpower/psycho boost/draco meteor/confused/asleep etc). Extreme speed has no stab, but is very useful nonetheless.
Shadow force nails lugia if it doesnt get sub up (generally they use whirlwind/dtail on the charge turn). Brick break to hit ferrothorn/arceus-normal/dialga/chansey/tyranitar.
This guy screws over choice locked terrakion (free sword dance) and blaziken when i predict hi jump kick (i dont know why people dont use low kick - its ubers lol. Hell I don't know why people use blaziken)
ANGELDUST @ Wide lens
Timid nature
252 SpAtt / 4 SpDef / 252 Spe
Pressure
Spacial Rend
Thunder
Fire Blast
Focus Blast
My mandatory kyogre counter. Wide lens you ask? Well I saw on another RMT thread that the guy used wide lens, and at first I was skeptical, but after using it I like it. People always expect scarf or specs, and while scarf would be useful, this thing rapes stall teams and fufills its role well. I have experimented with haban berry to beat opposing scarf palkias.
Quite often ill ko with spacial rend, in will come steel type and it will get roasted.
I've tweaked it slightly for BW2 and have enjoyed much success with this team on the ladder.







Calm nature
252 Hp / 16 Def / 220 SpDef / 20 Spe
Pressure
Stealth Rock
Flamethrower
Dragon Tail
Draco Meteor
I usually use this guy as my lead, and it gets rocks up vs most anything. The 16 def evs are there to ensure non-crit superpowers from Deoxys-A does not OHKO, and the speed evs are basically speed creep to beat other base 90 leads with no/little investment in speed.
Dragon tail is awesome, especially if i'm vs some noob that just sword dances straight away or calm minds straight away. Quite often i will get up rocks and use dragon tail quite a few times to rack up damage before dialga goes down. Flamethrower > fire blast simply because flamethrower still roasts ferro/forry and thats all i really need it for, and i like knowing I have a reliable move to hit them with. Draco meteor just for a strong stab attack, and because it's too good not to have.
A few opposing leads annoy me. Deoxys-S with taunt is a pain, once it taunts me, i just switch to forretress and rapid spin away their hazards or gyro ball. Darkrai can stop stealth rock getting up with dark void, but I still let dialga absorb the sleep then switch to scarf Kyogre, which noramlly comes in on the nasty plot. About 70% of the time it's some noob that just stays in and loses his darkrai to a OHKO water spout, but darkrai with focus sash or darkrai that uses thunder wave/substitute on the anticipated switch give me headaches. I just stay in vs groudon and use rocks, sometimes groudon ohkos with earthquake, but it is rare to run into such an offensive groudon lead. Most times groudon expects the switch and uses rocks anyway, and this dialga doesnt really care about being twaved. Vs ferro leads i SR first, and often i see them using protect 1st turn to scout out for the fire move. 2nd turn I use flamethrower :) Sometimes I don't even want to roast ferro, as forry just trolls it hard and gives me an ideal way to set up spikes and t spikes and just rapid spin away ferros hazards (smart rapid spinning here is key, because of iron barbs, dont rapid spin until it has 3 layers up, and look to see if they have a spin blocker).

Modest nature
252 SpAtt / 252 Spe / 4 Hp
Drizzle
Water Spout
Surf
Ice Beam
Thunder
In my opinion scarf kyogre should be on almost every team because it is the best pokemon in the metagame, and has been since its introduction in ruby/sapphire. I reliably revenge mewtwo and darkrai, and late game after the opposing team has been weakened through hazards and i've removed counters (palkia/ferrothorn/latias/gastrodon/arceus grass) this thing cleans up. If I suspect palkia will be switching in immediately expecting a water attack I thunder from the get go. Waterspout OHKO's shaymin sky after rocks.
I used to have the evs tailored so it just outsped mewtwo and had more bulk, but now I realise speed tying with other modest scarf ogres and outspeeding various deoxys is more important. This guy packs an immediate punch and nails teams if they have no counter.

Sassy nature
252 Hp / 12 Def / 244 SpDef
0 speed ivs
Sturdy
Gyro Ball
Spikes
Toxic Spikes
Rapid Spin
My fav pokemon. This guy is awesome. If you know how to play, this guy eats ferrothorn alive. I can always tell im playing a noob if he keeps his ferrothorn in on this guy. He resists outrage and I quite often switch into outrage and just rack up hazards. Gyro ball hurts mewtwo/darkrai/deoxys/terrakion/kyurem/frosslass and the latis to a degree, and basically anything that uses taunt.
Looking at the other team in team preview, I try to decide which hazards would be more beneficial. If they have a lot of steels i opt for spikes first, if their kyogre counter is gastrodon or grass arceus I opt for toxic spikes. If their team is laden with grounded sweepers like mewtwo and darkrai I aslo opt for toxic spikes 1st.
This guy can come in on outrage, lugia, ferrothorn, the pink blobs, draco meteor, choice locked attacks and deoxys (esp after superpower/psycho boost which seems to be really common) and set up hazards. Sturdy helps it out a lot.

Bold nature
252 Hp / 8 def / 248 Spe
Multiscale
Whirlwind
Toxic
Substitute
Roost
This guy is a beast. This is THE lugia set to use, anything else is retarded as far as i'm concerned. With hazards down I can just whirlwind, sub and roost all day to inflict major pain on the other team.
Whirlwind > dtail on lugia to phaze through sub and 100% accuracy. Dtails advantage is that it can work through taunt, but with lugias lack of attack and lack of stab dtail does miniscule damage that isn't even worth factoring into this decision. I can't stress enough how important it is to phaze through sub.
The speed evs are enough to reach 318, 1 more than max speed base 95s, and 90% of the time I outspeed opposing lugia, which wins you the mirror. I sub first anticipating their toxic (opposing whirlwind is a bitch here) then I toxic them. A poisoned lugia is a dead lugia, so sub is really awesome. I use sub to stop twave from groudon too. Groudon finds it very to hard to break lugias sub, only stone edge breaks it in one hit. Groudon plays a dangerous game if it tries to stay in on lugia (unless groudon packs the rare roar) because lugia can sub and roost in the face of stone edge until it misses and then u have sub up for free.
If even scarf kyogre switches into this lugia while lugia has a sub up, lugia will win one on one through toxic damage and spamming roost/sub. Slower kyogres never beat it.
The great wall provides insurance against many phys threats, most notably extreme killer arceus and rayquaza, and it nails noobs that use ninjask. I've raped whole teams with this guy.

Adamant nature
4 Hp / 252 Att / 252 Spe
Multitype
Extreme Speed
Brick Break
Swords Dance
Shadow Force
My spin blocker and almost 'mandatory' arceus forme (if you want your team to be the best it can be then you have to use an arceus).
Used to be bold nature with judgement and will o wisp, but I got raped by a guy using this version and have used it with great success ever since.
Switches in on forrys thinking I have no spin blocker(You cant tell arceus is ghost in preview) and Sword dances up. Forrys dumb enough to stay in just got their team swept. It is nice to have a set upper other than forry on my team to take advantage of opportunities to wreak havoc (opponents used superpower/psycho boost/draco meteor/confused/asleep etc). Extreme speed has no stab, but is very useful nonetheless.
Shadow force nails lugia if it doesnt get sub up (generally they use whirlwind/dtail on the charge turn). Brick break to hit ferrothorn/arceus-normal/dialga/chansey/tyranitar.
This guy screws over choice locked terrakion (free sword dance) and blaziken when i predict hi jump kick (i dont know why people dont use low kick - its ubers lol. Hell I don't know why people use blaziken)

Timid nature
252 SpAtt / 4 SpDef / 252 Spe
Pressure
Spacial Rend
Thunder
Fire Blast
Focus Blast
My mandatory kyogre counter. Wide lens you ask? Well I saw on another RMT thread that the guy used wide lens, and at first I was skeptical, but after using it I like it. People always expect scarf or specs, and while scarf would be useful, this thing rapes stall teams and fufills its role well. I have experimented with haban berry to beat opposing scarf palkias.
Quite often ill ko with spacial rend, in will come steel type and it will get roasted.