Dialga @ Leppa Berry  
Ability: Harvest  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Extreme Evoboost  
- Searing Sunraze Smash  
- Clangorous Soulblaze  
- Shore Up  

Mewtwo-Mega-Y @ Leftovers  
Ability: No Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Fissure  
- Photon Geyser  
- Moonblast  
- Spore  

Celesteela @ Leftovers  
Ability: Shadow Tag  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
- Core Enforcer  
- Taunt  
- Spectral Thief  
- Shore Up  

Arceus @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Glare  
- Knock Off  
- Defog  
- Shore Up  

Mewtwo-Mega-X @ Choice Band  
Ability: Shadow Tag  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- First Impression  
- Light That Burns the Sky  
- Searing Sunraze Smash  
- Close Combat  

Giratina-Origin (F) @ Leftovers  
Ability: Innards Out  
EVs: 252 HP / 252 SpA / 252 Spe  
Rash Nature  
IVs: 0 Atk / 0 Def / 0 SpD  
- Stealth Rock  
- Menacing Moonraze Maelstrom  
- Baton Pass  
- Shore Up