Item: Focus-sash
Ability: Technician
Nature: Jolly
EVs: 252 Attack, 252 Speed, 4 Hp
Spore: Sleep
Mach-punch: STAB+Priority+Technician boost
Stone-edge: Coverage
Bullet-seed: STAB+Technician boost
Each move is there to defeat another weather starter. Mach-punch: Tyranitar, and Possibly Abomasnow; Stone-edge: Ninetales, and Abomasnow; Bullet-seed: Politoed, and Hippowdon. Spore is just awesome.
Item: Leftovers
Ability: Drought
Nature: Timid
EVs: 220 Defense, 100 S.Attack, 100 S.Defense, 90 Speed
Fire-blast: STAB
Solar-beam: Coverage
Disable: Hehehe
Will-o-wisp: Status
Weather starter.
Item: Leftovers
Ability: Chlorophyll
Nature: Jolly
EVs: 252 Attack, 252 Speed, 6 Hp
Swords-dance: Boost up that Attack
Leaf-blade: STAB
Drain-punch: Coverage
Nature-power(Earthquake): Coverage
I know what you are thinking "WHY ON EARTH WOULD YOU CHOOSE BELLOSSOM FOR YOUR CHLOROPHYLL USER!!" Well it has good bulk, and some good moves and after a couple swords dances it can hit very hard.
Item: Leftovers
Ability: Natural-cure
Nature: Timid
EVs: 252 S.Attack, 252 Speed, 6 Hp
Rapid-spin: Spin away hazards
Psyshock: STAB
Thunder-bolt: Coverage
Ice-beam: Coverage
Spinner-sweeper.
Item: Leftovers
Ability: Serene-Hax
Nature: Bold
EVs: 200 Defense, 200 S.Defense, 110 S.Attack
Morning-sun: Healing
Air-slash: STAB+Flinch
Thunder-wave: Status
Aura-sphere: Coverage
Bulky tank of epicness.
Item: Leftovers
Ability: Multiscale
Nature: Jolly
EVs: 252 Attack, 252 Speed, 4 Defense
Fire-punch: Coverage
Dragon-dance: Boosting
Dragon-claw: STAB
Earthquake/Roost: Coverage or Healing
D-dancer.