My first Team

[Dskullkid]

Heatran - Air balloon - flash fire (248 hp,252 spa, 8 spe)modest nature.
Stealth rock/Hidden power Ice/fire blast/earth power
This is my main sun counter, and has stealth rock. Air balloon is there to counter things like dd mence/landorus, and hp ice to kill them.

Breloom - leftovers - technician (252 att, 252 spe, 4 hp) Adamant nature.
Mach punch/spore/low sweep/bullet seed
I like this Breloom set, alot. Come in on something slower/a resist, spore, then low sweep. Low sweep has 60 bp, so its affected by technician and the speed drop normally allows Breloom to outspeed what comes in or switch out to something that is almost guaranteed to be faster.

Starmie - leftovers/lifeorb - natural cure (252 spa, 252 spe, 4 hp) Timid nature.
Hydro pump/(thunderbolt/icebeam(/recover/rapid spin
I used to have something here that didn't have rapid spin/magic guard, but I was really weak to entry hazards. If I use thunderbolt, I can somewhat deal with jellicent that switch in. Still not sure on what moves/item to use for this.

Genesect - choice scarf - download (252 spa, 252 spe, 4 hp) Naive nature.
Thunder bolt/ice beam/flamethrower/u-turn
Genesect is here to lure fire attacks for heatran, and revenge killing. U-turn also hits things like reuniclus and latias/os really hard, and it does its job well. Also has a few helpful resists.

Porygon2 - eviolite - trace (252 hp, 176 def, 80 spD) Bold nature.
Ice beam/recover/toxic/discharge
I use porygon2 because I was somewhat gyarados/dragon weak without it. All choice scarf dragons fail to 2hko with outrage, and spec latios draco meteor has a very low chance to 2hko without hazards. toxic is mainly for hitting walls and because I'm using discharge

Landorus-T - leftovers - intimidate (252 att, 180 spe, 76 hp)
Rock polish/swords dance/earthquake/stone edge
My main sweeper, can easily come in on things like ferrothorn/forretress and set up a boost. If they stay in for spikes/leech seed, it can boost more. 0hkos/2hkos almost everything in the game after a swords dance, and with rock polish the only thing that can really stop it is ice shard/intimidate. evs allow me to outspeed scarf based 110s after a rock polish

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Offensive threats
red is a big threat
somewhat of a threat (eyes beware)
not a big threat

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Tyranitar:

• Choice Band - Has trouble coming in, but is a problem if it safely comes in.
• Choice Scarf - Doesn't deal enough damage to be a threat, and has trouble switching in. life orb starmie kos 50% of the time after rocks with hydro pump
• Dragon Dance - I'm not too familiar with these, but I assume Breloom and landorus can stop it.

Rotom-W:

• 
  [*]Choice Scarf / Specs -Breloom, and if porygon2 doesn't get tricked it can wall it
  [*]Support - Breloom hits it hard enough to where it can be taken out easily by others, doesn't like willowisp, and porygon 2 can completely wall it unless it for some reason has toxic

Scizor:

• Choice Band - Landorus-t, genesect and porygon 2 can take 3/4 moves.
• Swords Dance - Heatran completely walls it, and landorus-t can deal with it.
• Bulky Swords Dance - heatran, landorus-t

Dragonite:

• Choice Band - Porygon 2 can take anything it throws out, and if air balloon is up so can heatran. Genesect can also somewhat deal with it
• Dragon Dance - porygon 2, and heatran/genesect
• Mixed - heatran/porygon 2
• Parashuffler - heatran/porygon 2
• Rain Abuse - heatran if no aqua tail, porygon 2

Politoed:

• Choice Specs / Scarf - Have to play around it.
• 3 Attacks - Breloom, but he can't switch in. porygon 2 is 3hkoed by rain boosted +spa hydro pump.

Heatran:

• Standard - Heatran with balloon up can deal with it, and it also has trouble switching in.
• Choice Scarf / Specs- Specs hits really hard and I have some trouble dealing with it, but heatran with balloon up can deal with it. Timid specs outspeeds landorus-t, but I'm not sure if I want to get rid of the bulk since specs heatran is so rare.

Jirachi:

• Substitute + Calm Mind / Wish + Calm Mind - Heatran, genesect, landorus-t

Latios:

• Choice Scarf / Specs -Heatran, porygon 2, genesect for specs
• Calm Mind - genesect, porygon 2, heatran

Reuniclus:

• Calm Mind - Genesect, breloom can spore it
• Offensive Trick Room - Genesect

Haxorus:

• Choice Scarf / Choice Band - heatran/porygon2/genesect

Conkeldurr:

• Bulk Up - landorus-t
• Flame Orb + 3 Attacks - have to wear it down and eventually kill it.

Celebi:

• Nasty Plot Sweeper - Heatran

Terrakion:

• Double Dance -
• Choice Scarf / Choice Band -
• Substitute + Swords Dance / Salac Berry -Breloom mach punch can finish it off

Gengar:

• Substitute + Disable / Pain Split - Heatran/porygon 2 can deal with it, but porygon 2 has to rely on focus miss missing

Alakazam:

• Substitute + 3 Attacks - can't really wall it, except that i can't see it coming in easily.

Kingdra:

• Dragon Dance - porygon 2 can, but it has a chance of not breaking a sub with ice beam

Any help is appreciated! But I don't want to replace landorus-t and breloom.
CURRENTLY TESTING DONPHAN OVER STARMIE, leaves me water weak though

 

[Red3mpti0n]

Pretty solid team here, just a few things:

Any reason why you're using Lava Plume on offensive Heatran? Air balloon already gives away the fact that you're offensive so there's no point in trying to bluff the SpD build. Flamethrower/Fire Blast would be a better option IMO. Nothing wrong with more power. And I think it should be max SpA and Spe with either a Modest or Timid nature. Modest is perfectly viable, however Timid lets you outspeed neutral Dragonite and Breloom and OHKO with HP Ice.

With all the coverage you have between your other attackers, Starmie really only needs Hydro Pump/Surf and Ice Beam with Rapid Spin for STAB and Dragon-types, respectively. Psyshock/Psychic > Thunderbolt is certainly viable, as it hits the Fighting-types that probably give you trouble and hits Gengar that try to spinblock you more reliably. LO/Leftovers is preference really; you seem to have ways of dealing that threaten Landorus-T so the power you'd lose from LO won't make or break you.

One word: Volcarona. It rolls all over you. Starmie can outspeed before a boost and Heatran can take a few hits, but Volc will just set up in both of their faces and eventually take them down. The only thing I could suggest is using max speed, Timid nature on Landorus-T or run max speed, Adamant Landorus-I. Both require you to pray that Volc is Modest so you can KO with SE but theres not much else to do w/o changing the team much.