After a long break from pokemon I tried getting back into the game. But platinum screwed my old team over with bullet-punch scizor and rotom machines (yes it has been that long). So I decided to build a new team from scratch. Please remember that I have been out for a while, I don't know some of the new threats.
Lead:
Donphan
Adamant @ leftovers/blackglasses/life-orb
252 hp/ 252 att 4 def
EQ
rapid spin/ice-shard
Stealth rock
Assurance
Lead donphan sets up stealth rocks and acts as a physical wall of some sorts. With stealthrocks up assurance turns into a 100bp darktype attack.
And who loves to switch into donphan? Right, latias and rotom. Thats where assurance comes in.
Damage calcs:
max att donphan assurance on the switch against 128HP/0 timid latias with stealthrocks up:
leftovers: 74.77% - 87.99% (with stealthrock damage 87.37-100.49) Slim chance of OHKO.
blackglasses: 89.79% - 105.71% with stealth rocks always a OHKO.
Donphan against 252/136 calm rotom
leftovers: 62.50% - 73.68% (with stealthrock damage 65.00-86.18) Never a OHKO
Blackglasses: 75.33% - 88.49% (with stealthrock damage 87.83-100.99) Slim chance of OHKO.
In both cases life-orb provide a OHKO, except against rotom who has a very slim chance of surviving.
Also anything that's immune to EQ, are eitheer levitators of flyers, two of the most common levitators are covered above, and flyers get smacked with stealthrock draining 25% AND get hit by a hard assurance.
This is thus the problem of the itemchoice. Do I want leftovers to recover damage so donphan lives longer and can act more like a physical sponge.
Do I want blackglasses to get the KO on latias but not rotom. Or do I even want to loose HP in favor of almost certainly get the KO on both pokemon. I can also opt for lumberry to resist sleepers.
After that comes the problem of the fourth move. EQ, stealth rock and assurance are given. But do I want to be able to spin the rocks away, eventhough only one of my pokemon is weak to it? Or do I want a priority ice-attack?
Blissey
Bold 252 hp/252 def/ 4 sp.def
Aromatherapy
Softboiled
Seismictoss /counter
Toxic / counter
Blissey is the specialwall and cleric of my team. Aromatherapy heals nasty paralyses and lets it beat other blissey (or other special att walls) who have toxic, but no aromatherapy one on one. That has saved me a billion times. However between seismic toss toxic and counter I can't choose. Almost everybattle I wished I had choosen the other move, and screwed myself. But on avarage this works the best. Max defence and HP is just something I like to use. The extra defence really helps at times (plus I have a blissey for wi-fi use with those stats and I don't want to rebreed since it's level 100).
Staraptor
Adamant/Jolly @ choicescarf / choiceband respectivly(sp?)
252 att / 252 speed 4 def
U-turn / quick-attack
Double-edge / quick-attack
Bravebird
Close-combat
Staraptor acts like a revengekiller or powerhouse. I'm really doubting between adamant scarf, or jolly band. Scarf gives it much needed speed against foes as scarf-tran DD-tar latias or flygon (for the speed tie). Whereelse band gives it the power to strip 67% from zapdos and OHKO latias with double-edge.
Speaking of wich, in this metagame priority is a must. Wich move could best be dropped U-turn to scout, or the powermove double-edge. Or does scarf give it enough speed already. Remember it still intimidates choice-scizor if it tries to bullet-punch.
This is also the pokemon who is weak to stealthrocks, and it will do quite a lot of switching. So relating to donphans move choice rapid-spin or ice-shard.
Starmie
Modest / timid @ choice-specs
252 sp.att/ 252 speed
Surf
Icebeam
Thunderbolt
Trick / attacking move
Modest choicespecs starmie does a LOT of damage. Modest plus choice specs allow me to 2HKO the most common switchins. So I prefer her power over speed. Although the speed can be troublesome. I beleive timid latias outspeeds modest starmie. Trick can be used to disable walls and some physical attackers, but I can also opt for another attacking move, but in my experience it was not needed.
Breloom
Jolly @ toxic-orb
252 att / 252 speed 4HP(?)
Substitute
Spore
Thunderpunch / Seedbomb
Focuspunch
Ah, breloom with his 100% accurate sleep move. It now comes with an ability that heals when poisened, so it acts as a statusabsorber aswell (blisseys T-wave / toxic). Although watch out after the use of aromatherapy. This thing sleeps something, hopefully named scizor or an attacker and not a wall. After that substitute of focuspunch imidiatly if you suspect you have to switch out anyway. Thunderpunch is for gyarados (and scizor in a pinch, it might survive bulletpunch). While seedbomb can be used against swampert / hippowdown. Also should the remaining EV's go into HP or defence?
Lucario
Jolly @ physical version of wiseglasses (forgot name lol)
252 att / 252 speed 4 def
Swordsdance
Extremespeed
Closecombat
Ice-punch / crunch
My lategame sweeper, wait till the walls are death or weakened and send this in. Sworddance plus extremespeed rival bulletpunch scizor, and as an added bonus lucario resists bulletpunch and is faster to take down scizor with closecombat, than he can use superpower. The last move is a toss-up, ice-punch against dragons or crunch if rotom or other ghosts still live.
Well this is my team, please rate.
Lead:

Donphan
Adamant @ leftovers/blackglasses/life-orb
252 hp/ 252 att 4 def
EQ
rapid spin/ice-shard
Stealth rock
Assurance
Lead donphan sets up stealth rocks and acts as a physical wall of some sorts. With stealthrocks up assurance turns into a 100bp darktype attack.
And who loves to switch into donphan? Right, latias and rotom. Thats where assurance comes in.
Damage calcs:
max att donphan assurance on the switch against 128HP/0 timid latias with stealthrocks up:
leftovers: 74.77% - 87.99% (with stealthrock damage 87.37-100.49) Slim chance of OHKO.
blackglasses: 89.79% - 105.71% with stealth rocks always a OHKO.
Donphan against 252/136 calm rotom
leftovers: 62.50% - 73.68% (with stealthrock damage 65.00-86.18) Never a OHKO
Blackglasses: 75.33% - 88.49% (with stealthrock damage 87.83-100.99) Slim chance of OHKO.
In both cases life-orb provide a OHKO, except against rotom who has a very slim chance of surviving.
Also anything that's immune to EQ, are eitheer levitators of flyers, two of the most common levitators are covered above, and flyers get smacked with stealthrock draining 25% AND get hit by a hard assurance.
This is thus the problem of the itemchoice. Do I want leftovers to recover damage so donphan lives longer and can act more like a physical sponge.
Do I want blackglasses to get the KO on latias but not rotom. Or do I even want to loose HP in favor of almost certainly get the KO on both pokemon. I can also opt for lumberry to resist sleepers.
After that comes the problem of the fourth move. EQ, stealth rock and assurance are given. But do I want to be able to spin the rocks away, eventhough only one of my pokemon is weak to it? Or do I want a priority ice-attack?

Blissey
Bold 252 hp/252 def/ 4 sp.def
Aromatherapy
Softboiled
Seismictoss /counter
Toxic / counter
Blissey is the specialwall and cleric of my team. Aromatherapy heals nasty paralyses and lets it beat other blissey (or other special att walls) who have toxic, but no aromatherapy one on one. That has saved me a billion times. However between seismic toss toxic and counter I can't choose. Almost everybattle I wished I had choosen the other move, and screwed myself. But on avarage this works the best. Max defence and HP is just something I like to use. The extra defence really helps at times (plus I have a blissey for wi-fi use with those stats and I don't want to rebreed since it's level 100).

Staraptor
Adamant/Jolly @ choicescarf / choiceband respectivly(sp?)
252 att / 252 speed 4 def
U-turn / quick-attack
Double-edge / quick-attack
Bravebird
Close-combat
Staraptor acts like a revengekiller or powerhouse. I'm really doubting between adamant scarf, or jolly band. Scarf gives it much needed speed against foes as scarf-tran DD-tar latias or flygon (for the speed tie). Whereelse band gives it the power to strip 67% from zapdos and OHKO latias with double-edge.
Speaking of wich, in this metagame priority is a must. Wich move could best be dropped U-turn to scout, or the powermove double-edge. Or does scarf give it enough speed already. Remember it still intimidates choice-scizor if it tries to bullet-punch.
This is also the pokemon who is weak to stealthrocks, and it will do quite a lot of switching. So relating to donphans move choice rapid-spin or ice-shard.

Starmie
Modest / timid @ choice-specs
252 sp.att/ 252 speed
Surf
Icebeam
Thunderbolt
Trick / attacking move
Modest choicespecs starmie does a LOT of damage. Modest plus choice specs allow me to 2HKO the most common switchins. So I prefer her power over speed. Although the speed can be troublesome. I beleive timid latias outspeeds modest starmie. Trick can be used to disable walls and some physical attackers, but I can also opt for another attacking move, but in my experience it was not needed.

Breloom
Jolly @ toxic-orb
252 att / 252 speed 4HP(?)
Substitute
Spore
Thunderpunch / Seedbomb
Focuspunch
Ah, breloom with his 100% accurate sleep move. It now comes with an ability that heals when poisened, so it acts as a statusabsorber aswell (blisseys T-wave / toxic). Although watch out after the use of aromatherapy. This thing sleeps something, hopefully named scizor or an attacker and not a wall. After that substitute of focuspunch imidiatly if you suspect you have to switch out anyway. Thunderpunch is for gyarados (and scizor in a pinch, it might survive bulletpunch). While seedbomb can be used against swampert / hippowdown. Also should the remaining EV's go into HP or defence?

Lucario
Jolly @ physical version of wiseglasses (forgot name lol)
252 att / 252 speed 4 def
Swordsdance
Extremespeed
Closecombat
Ice-punch / crunch
My lategame sweeper, wait till the walls are death or weakened and send this in. Sworddance plus extremespeed rival bulletpunch scizor, and as an added bonus lucario resists bulletpunch and is faster to take down scizor with closecombat, than he can use superpower. The last move is a toss-up, ice-punch against dragons or crunch if rotom or other ghosts still live.
Well this is my team, please rate.