Here's the team I ran last year:
Heatran @ Leftovers
Ability: Flash Fire
EVs: 4 HP / 252 SAtk / 252 Spd
Mild Nature (+SAtk, -Def)
- Magma Storm
- Sunny Day
- SolarBeam
- Roar
Heatran's signature move Magma storm is an absolute beast. In the sun, it KO's nearly anything that doesn't resist, AND traps them. He destroys Politoed rain teams. Magma storm, trap poli, sunny day, laugh as hydro pump does 25% then kill with solar beam. Against non-rain teams, he serves as a backup sun setup in case Ninetales dies. Struggled to think of a move for a fourth spot, so I went for roar.
Donphan @ Leftovers
Ability: Sturdy
EVs: 252 HP / 152 Def / 104 Atk
Impish Nature (+Def -SAtk)
- Earthquake
- Rapid Spin
- Stealth Rock
- Ice Shard
My rapid spinner and entry hazard Pokemon. Atk EV investment is to ensure a 2HKO of Salamence (otherwise I'd have to rely on lucky min-max damage rolls). With this investment, EQ will also OHKO Terrakion without rocks up. Again as a sun team, getting rid of rocks helps my Ninetales and Mence to stay alive.
Lilligant @ Life Orb
Ability: Chlorophyll
EVs: 64 HP / 252 SAtk / 192 Spd
Modest Nature (+SAtk, -Atk)
- Sleep Powder
- Quiver Dance
- HP Ice
- Giga Drain
After two quiver dances, nothing much can stand up to her, even outside of the sun. Spd EVs are set up to outspeed scarfed Latios in the sun without any dances. With life orb, a dance, HP ice will OHKO a Multiscale Dragonite without rocks support. Yache berry Mence will also go down. Lilligant doesn't mess around.
Salamence @ Lum Berry
Ability: Moxie
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Dance
- Dragon Claw
- Earthquake
- Fire Fang
Dream world has brought this guy back to me. MoxieMence is terrifying. Jolly nature was to OHKO scarfed Genesect (now obsolete) Outrage doesn't go well with Moxie imo, and with DD, I can easily build up enough power. He resists a lot of types that will cause this team problems. The excellent coverage means I don't want to be locked into a movie either so I went with Lum berry.
Ninetales @ Leftovers
Ability: Drought
EVs: 252 HP / 144 SDef / 112 Spd
Calm Nature (+SDef, -Atk)
- Sunny Day
- Will-O-Wisp
- SolarBeam
- Flamethrower
Another Dream world wonder. She is the crutch of the team and must stay alive. The EV spread represents this. Against a sandstorm team, she can survive and burn TTar. Predict the switch to Politoeds and TTars, set up sunny day and then nuke them with a solar beam. Against teams with no weather, I'll fodder her off to cripple a threat.
Raikou @ Choice Scarf
Ability: Pressure
EVs: 4 HP / 252 SAtk / 252 Spd
Rash Nature (+SAtk, -SDef)
- Aura Sphere
- Volt Switch
- HP Ice
- Weather Ball
Theorycrafted a few pokemon in this slot and finally went with the rather unusual Raikou. This guy can function in any weather. Weather ball in the sun and rain hits at a whopping 150 power. OHKO's TTar with rocks. Genesect dies. Mamoswine dies. Everything dies to this. HP ice wrecks the Genies. Volt switch makes him an excellent scout.