Eternatus @ Covert Cloak  
Ability: Merciless  
Tera Type: Psychic  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Draco Meteor  
- Fleur Cannon  
- Overheat  
- Strength Sap  

Dialga-Origin @ Adamant Crystal  
Ability: Merciless  
Tera Type: Steel  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Make It Rain  
- Draco Meteor  
- Overheat  
- Strength Sap  

Arceus-Poison @ Earth Plate  
Ability: Fur Coat  
Tera Type: Poison  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Mortal Spin  
- Judgment  
- Toxic Spikes  
- Strength Sap  

Chansey (F) @ Eviolite  
Ability: Imposter  
Tera Type: Normal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Spirit Shackle  
- Wish  
- Baneful Bunker  
- Heal Bell  

Yveltal @ Covert Cloak  
Ability: Fur Coat  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Knock Off  
- Mortal Spin  
- Haze  
- Strength Sap  

Steelix-Mega @ Covert Cloak  
Ability: Toxic Debris  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Strength Sap  
- Stone Axe  
- U-turn  
- Mortal Spin