I'm still pretty new at this, but after reading almost every smogon analysis for black and white I decided to try and make my own competitive on Pokemon Showdown, and after a lot of battles, major changes, and minor tweaking this is the team I have settled on and has given me a good amount of success to boot! So with out further adieu
Tornadus-Therian
Item: Flying Gem
Ability: Regenerator
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature (+Spd -SpA)
~ Acrobatics
~ Super Power
~ Taunt
~ Bulk Up
Tornadus-T is what I usually lead with. Taunt is an excellent move shutting down the opposing lead, if they are Spikers or setup sweepers, its also great for dealing with walls later in the game. I chose to go with Physical Tornadus-T instead of Special for several reasons. For one, I find the down sides of my two attacking moves to be a lot more manageable, then the Shaky accuracy of their special equivalents, Hurricane and Focus Blast. Another is a can up my attack with Bulk up, which I can't do with Special Tornadus-T. I also like the Acrobatics + Flying Gem Combo in case I need to launch a powerful attack right away. Overall I feel it is a versatile Anti-Lead.
Mamoswine
Item: Expert Belt
Ability: Thick Fat
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature (+Atk -SpA)
~ Earthquake
~ Ice Shard
~ Icicle Crash
~ Super Power
A fairly standard Mamoswine set, but that because I feel it dose its job so well, and that job is destroying the opposing Dragon or Steel pokemon with the appropriate move. I went for Expert Belt instead of Life Orb of Choice band, because it hits all the stuff I want it to hit with close to the same damage as Life Orb with out taking its life away, nor locking it into one move like Choice Band.
Rotom-Wash
Item: Choice Specs
Ablilty: Levitate
EVs: 252 HP / 252 SpA / 4 Spe
Timid Nature (+Spe -Atk)
~ Hydro Pump
~ Volt Switch
~ Trick
~ Hidden Power (Fire)
I find this set is good for a taking a decent amount of hits, and can help scout the opposing team with Volt switch, or if I feel an opposing opposing pokemon is going to switch in and absorb the volt switch, like a Ground type or Thundarus-T, Hydro Pump is usually powerful enough to 1HKO the switch in. HP fire helps alot with steel types, mainly Scizor, and Trick is another grate option to deal with opposing walls.
Alakazam
Item: Focus Sash
Ability: Magic Guard
EVs: 4 Hp / 252 SpA / 252 Spe
Timid Nature (+Spe -Atk)
~ Psyschock
~ Focus Blast
~ Shadow Ball
~ Hidden Power (Ice)
With the combination of Magic Guard and Focus Sash, this Alakazam will always take at least one hit, and most of the time one hit is all he needs to deal with a rampaging setup sweeper, help shift the momentum of the battle in my favor. Psyshock over Psychic because having a special attacker hit physical defense of a pokemon to be very helpful. Focus Blast and Shadow Ball are standard coverage moves. I went for HP Ice for the last move slot due to the large amount powerful pokemon that are weak to Ice, and it has been a very helpful move to deal with them once Mamoswine goes down.
Latias
Item: Lum Berry
Ability: Levitate
EVs: 4 SpA / 252 SpD / 252 Spe
Modest Nature (+SpA -Atk)
~ Calm Mind
~ Recover
~ Dragon Pulse
~ Roar
Latias can take Special Hits like a real champ, setup with calm mind, and then preform a high speed sweep. I chose Lum Berry instead of leftovers, because since I am mainly switching her into stuff like Thunder, Hurricanes, and weaker Ice beams, status hax has been her down fall for the longest time, and Lum alleviates the problem somewhat. It is also nice to have something switch in a predicted Breloom Spore, absorbed it, then outspeed and KO it on the next turn. Recover dose a good job of keeping her alive. Dragon Pulse is a good constant STAB move. Roar is great for dealing with opposing setup sweepers thinking they can setup on Latias, and assuming I dont Roar in something else threatening I can get a recover or another Calm Mind.
Heatran
Item: Leftovers
Ability: Flash Fire
EVs: 252 Hp / 252 Spa / 4 Spe
Modest Nature (+Spa -Atk)
~ Fire Blast
~ Earth Power
~ Sunny Day
~ Solar beam
This set I find excellent for dealing with sun teams and rain teams. Fire Blast is the main STAB and Earth Power deals with opposing fire pokemon the Heatran loves switching into. A well placed Sunny Day can be a real momentum killer for rain teams, especially if Politoad is gone. Heatran takes neutral damage from water attacks in sunny conditions, while he can deal with opposing waters with a no charge up Solar Beam, and my fire blast gets a power up too. Hurricane and Thunder becoming alot less accurate, and all rain abilities being shut down is also a big help. I find that the fact that a fire pokemon that counters rain teams being so counter intuitive really helps with the effectiveness of this set.
Tornadus-Therian
Item: Flying Gem
Ability: Regenerator
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature (+Spd -SpA)
~ Acrobatics
~ Super Power
~ Taunt
~ Bulk Up
Tornadus-T is what I usually lead with. Taunt is an excellent move shutting down the opposing lead, if they are Spikers or setup sweepers, its also great for dealing with walls later in the game. I chose to go with Physical Tornadus-T instead of Special for several reasons. For one, I find the down sides of my two attacking moves to be a lot more manageable, then the Shaky accuracy of their special equivalents, Hurricane and Focus Blast. Another is a can up my attack with Bulk up, which I can't do with Special Tornadus-T. I also like the Acrobatics + Flying Gem Combo in case I need to launch a powerful attack right away. Overall I feel it is a versatile Anti-Lead.
Mamoswine
Item: Expert Belt
Ability: Thick Fat
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature (+Atk -SpA)
~ Earthquake
~ Ice Shard
~ Icicle Crash
~ Super Power
A fairly standard Mamoswine set, but that because I feel it dose its job so well, and that job is destroying the opposing Dragon or Steel pokemon with the appropriate move. I went for Expert Belt instead of Life Orb of Choice band, because it hits all the stuff I want it to hit with close to the same damage as Life Orb with out taking its life away, nor locking it into one move like Choice Band.
Rotom-Wash
Item: Choice Specs
Ablilty: Levitate
EVs: 252 HP / 252 SpA / 4 Spe
Timid Nature (+Spe -Atk)
~ Hydro Pump
~ Volt Switch
~ Trick
~ Hidden Power (Fire)
I find this set is good for a taking a decent amount of hits, and can help scout the opposing team with Volt switch, or if I feel an opposing opposing pokemon is going to switch in and absorb the volt switch, like a Ground type or Thundarus-T, Hydro Pump is usually powerful enough to 1HKO the switch in. HP fire helps alot with steel types, mainly Scizor, and Trick is another grate option to deal with opposing walls.
Alakazam
Item: Focus Sash
Ability: Magic Guard
EVs: 4 Hp / 252 SpA / 252 Spe
Timid Nature (+Spe -Atk)
~ Psyschock
~ Focus Blast
~ Shadow Ball
~ Hidden Power (Ice)
With the combination of Magic Guard and Focus Sash, this Alakazam will always take at least one hit, and most of the time one hit is all he needs to deal with a rampaging setup sweeper, help shift the momentum of the battle in my favor. Psyshock over Psychic because having a special attacker hit physical defense of a pokemon to be very helpful. Focus Blast and Shadow Ball are standard coverage moves. I went for HP Ice for the last move slot due to the large amount powerful pokemon that are weak to Ice, and it has been a very helpful move to deal with them once Mamoswine goes down.
Latias
Item: Lum Berry
Ability: Levitate
EVs: 4 SpA / 252 SpD / 252 Spe
Modest Nature (+SpA -Atk)
~ Calm Mind
~ Recover
~ Dragon Pulse
~ Roar
Latias can take Special Hits like a real champ, setup with calm mind, and then preform a high speed sweep. I chose Lum Berry instead of leftovers, because since I am mainly switching her into stuff like Thunder, Hurricanes, and weaker Ice beams, status hax has been her down fall for the longest time, and Lum alleviates the problem somewhat. It is also nice to have something switch in a predicted Breloom Spore, absorbed it, then outspeed and KO it on the next turn. Recover dose a good job of keeping her alive. Dragon Pulse is a good constant STAB move. Roar is great for dealing with opposing setup sweepers thinking they can setup on Latias, and assuming I dont Roar in something else threatening I can get a recover or another Calm Mind.
Heatran
Item: Leftovers
Ability: Flash Fire
EVs: 252 Hp / 252 Spa / 4 Spe
Modest Nature (+Spa -Atk)
~ Fire Blast
~ Earth Power
~ Sunny Day
~ Solar beam
This set I find excellent for dealing with sun teams and rain teams. Fire Blast is the main STAB and Earth Power deals with opposing fire pokemon the Heatran loves switching into. A well placed Sunny Day can be a real momentum killer for rain teams, especially if Politoad is gone. Heatran takes neutral damage from water attacks in sunny conditions, while he can deal with opposing waters with a no charge up Solar Beam, and my fire blast gets a power up too. Hurricane and Thunder becoming alot less accurate, and all rain abilities being shut down is also a big help. I find that the fact that a fire pokemon that counters rain teams being so counter intuitive really helps with the effectiveness of this set.