Nineties double weather core (need a sixth mon)

Ninetales @ Firium Z
Ability: Drought
IVs: 0 Atk
- Fire Blast
- Solar Beam
- Psyshock
- Nasty Plot

Rotom-Frost @ Choice Scarf
Ability: Levitate
EVs: 16 Def / 240 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Thunderbolt
- Blizzard
- Trick

Venusaur @ Life Orb
Ability: Overgrow
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Giga Drain
- Sludge Bomb
- Hidden Power [Fire]
- Growth

Gigalith @ Leftovers
Ability: Sand Stream
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Stone Edge
- Earthquake
- Stealth Rock
- Explosion

Stoutland @ Choice Band
Ability: Sand Rush
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Return
- Crunch
- Superpower
- Retaliate