Arceus-Water @ Splash Plate  
Ability: Ice Scales  
Tera Type: Water  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Take Heart  
- Scald  
- Spirit Shackle  
- Recover  

Diancie-Mega @ Wide Lens  
Ability: Pixilate  
Tera Type: Rock  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Population Bomb  
- Extreme Speed  
- V-create  
- Boomburst  

Yveltal @ Heavy-Duty Boots  
Ability: Fur Coat  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Strength Sap  
- Knock Off  
- Rapid Spin  
- Toxic  

Garchomp-Mega @ Life Orb  
Ability: Adaptability  
Tera Type: Dragon  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
IVs: 9 Def  
- Shift Gear  
- Headlong Rush  
- Glaive Rush  
- Jungle Healing  

Nihilego @ Rocky Helmet  
Ability: Ice Scales  
Tera Type: Rock  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Revelation Dance  
- Shore Up  
- Teleport  
- Clear Smog  

Chansey (F) @ Eviolite  
Ability: Imposter  
Tera Type: Normal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Block  
- Soft-Boiled  
- Heal Bell  
- Court Change