Aurorus @ Light Clay  
Ability: Snow Warning  
Tera Type: Rock  
EVs: 16 HP / 252 Def / 136 SpD / 104 Spe  
Calm Nature  
IVs: 0 Atk  
- Blizzard  
- Stealth Rock  
- Aurora Veil  
- Freeze-Dry  

Darkrai @ Choice Scarf  
Ability: Bad Dreams  
Tera Type: Dark  
EVs: 168 HP / 252 SpA / 84 SpD / 4 Spe  
Modest Nature  
IVs: 0 Atk  
- Focus Blast  
- Dark Pulse  
- Blizzard  
- Trick  

Castform (F) @ Sitrus Berry  
Ability: Forecast  
Tera Type: Normal  
EVs: 252 HP / 104 SpD / 152 Spe  
Calm Nature  
IVs: 0 Atk  
- Protect  
- Blizzard  
- Tailwind  
- Thunder Wave  

Thundurus (M) @ Sitrus Berry  
Ability: Prankster  
Tera Type: Electric  
EVs: 176 SpA / 136 SpD / 196 Spe  
Modest Nature  
IVs: 0 Atk  
- Thunderbolt  
- Discharge  
- Scary Face  
- Weather Ball  

Barraskewda @ Focus Sash  
Ability: Swift Swim  
Tera Type: Water  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
- Protect  
- Flip Turn  
- Close Combat  
- Ice Fang  

Sceptile-Mega @ Sceptilite  
Ability: Overgrow  
Tera Type: Grass  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Focus Blast  
- Detect  
- Giga Drain  
- Dragon Pulse