Groudon-Primal @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 4 SpA / 4 Spe  
Bold Nature  
IVs: 0 Atk  
- Lava Plume  
- Whirlwind  
- Recover  
- Spikes  

Kyogre-Primal @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 8 Def / 252 SpD  
Sassy Nature  
IVs: 0 Atk / 0 Spe  
- Defog  
- Heal Order  
- Parting Shot  
- Scald  

Diancie-Mega @ Iron Plate  
Ability: Mold Breaker  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Judgment  
- Taunt  
- Searing Shot  
- Moonblast  

Gyarados-Mega @ Lum Berry  
Ability: Huge Power  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
IVs: 0 SpA  
- Water Shuriken  
- Beat Up  
- Pursuit  
- Ice Shard  

Chansey (F) @ Eviolite  
Ability: Imposter  
Happiness: 0  
EVs: 248 HP / 252 Def / 8 SpA  
Relaxed Nature  
IVs: 1 Atk / 30 SpA / 0 Spe  
- Wish  
- Whirlwind  
- Chatter  
- Heal Bell  

Arceus-Fire @ Leftovers  
Ability: Wonder Guard  
Shiny: Yes  
EVs: 248 HP / 136 SpA / 124 Spe  
Timid Nature  
IVs: 0 Atk  
- Quiver Dance  
- Baton Pass  
- Substitute  
- Boomburst