Hail Volcarona

Abomasnow (M) @ Expert Belt
Trait: Snow Warning
EVs: 252 Atk / 144 SAtk / 112 Spd
Lonely Nature (+Atk, -Def)
- Ice Shard
- Protect
- Hidden Power [Fire]
- Wood Hammer

Volcarona (M) @ Lum Berry
Trait: Flame Body
EVs: 252 SAtk / 4 SDef / 252 Spd
Timid Nature (+Spd, -Atk)
- Quiver Dance
- Fire Blast
- Hidden Power [Ice]
- Giga Drain

Starmie @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 40 SAtk / 216 Spd
Timid Nature (+Spd, -Atk)
- Hydro Pump
- Rapid Spin
- Psyshock
- Recover

Jirachi @ Choice Scarf
Trait: Serene Grace
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- U-turn
- Iron Head
- Trick
- Fire Punch

Mamoswine (F) @ Focus Sash
Trait: Snow Cloak
EVs: 252 Atk / 4 Def / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Stealth Rock
- Earthquake
- Superpower
- Ice Shard

Latias (F) @ Leftovers
Trait: Levitate
EVs: 252 HP / 4 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Calm Mind
- Dragon Pulse
- Hidden Power [Fire]
- Recover