Latios-Mega (M) @ Soul Dew  
Ability: Protean  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- King's Shield  
- Freeze-Dry  
- Sludge Wave  
- Secret Sword  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Low Kick  
- Gunk Shot  
- Sacred Fire  
- Beat Up  

Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Stealth Rock  
- Sacred Fire  
- Recover  
- Parting Shot  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpA  
Bold Nature  
IVs: 0 Atk  
- Curse  
- Recover  
- Lava Plume  
- Encore  

Manectric-Mega @ Choice Scarf  
Ability: No Guard  
EVs: 252 HP / 4 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Trick  
- Gastro Acid  
- Parting Shot  
- Sheer Cold  

Groudon-Primal @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Poison Fang  
- Defog  
- Recover  
- Parting Shot