Dialga @ Eject Pack  
Ability: Pressure  
Tera Type: Steel  
EVs: 252 HP / 4 Def / 252 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Steel Beam  
- Draco Meteor  
- Fire Blast  
- Trick Room  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
Tera Type: Psychic  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Photon Geyser  
- Earthquake  
- Swords Dance  
- Trick Room  

Magearna @ Eject Pack  
Ability: Soul-Heart  
Tera Type: Steel  
EVs: 252 HP / 4 Def / 252 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Steel Beam  
- Fleur Cannon  
- Volt Switch  
- Trick Room  

Mawile-Mega @ Mawilite  
Ability: Intimidate  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Play Rough  
- Fire Fang  
- Sucker Punch  
- Swords Dance  

Melmetal @ Choice Band  
Ability: Iron Fist  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 4 Def  
Brave Nature  
IVs: 0 Spe  
- Double Iron Bash  
- Earthquake  
- Ice Punch  
- Thunder Punch  

Genesect @ Choice Band  
Ability: Download  
Shiny: Yes  
Tera Type: Bug  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- U-turn  
- Blaze Kick  
- Flamethrower  
- Extreme Speed