Doomsday sun

Torkoal @ Heat Rock
Ability: Drought
EVs: 248 HP / 252 Def / 8 SpD
Relaxed Nature
- Lava Plume
- Rapid Spin
- Earth Power
- Explosion

Houndoom-Mega @ Houndoominite
Ability: Flash Fire
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Dark Pulse
- Fire Blast
- Solar Beam
- Sucker Punch

Landorus-Therian @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 216 Def / 28 SpD / 16 Spe
Impish Nature
- Stealth Rock
- Earthquake
- Hidden Power [Ice]
- U-turn

Chansey @ Eviolite
Ability: Natural Cure
EVs: 252 Def / 48 SpA / 208 SpD
Bold Nature
IVs: 0 Atk
- Soft-Boiled
- Seismic Toss
- Ice Beam
- Toxic

Venusaur @ Life Orb
Ability: Chlorophyll
EVs: 4 Def / 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Sludge Bomb
- Solar Beam
- Hidden Power [Fire]
- Growth

Dragonite @ Flyinium Z
Ability: Multiscale
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Fly
- Extreme Speed
- Earthquake