Blissey (F) @ Shed Shell  
Ability: Innards Out  
EVs: 252 HP / 252 SpD / 252 Spe  
Gentle Nature  
IVs: 0 Atk / 0 Def  
- Taunt  
- Roost  
- Whirlwind  
- Baton Pass  

Articuno @ Eject Button  
Ability: Magic Bounce  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Spectral Thief  
- Heal Order  
- Defog  
- Baton Pass  

Lopunny-Mega @ Focus Sash  
Ability: No Guard  
EVs: 248 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sheer Cold  
- Taunt  
- Sticky Web  
- Stealth Rock  

Groudon-Primal @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Bonemerang  
- Sunsteel Strike  
- Ice Shard  
- Shell Smash  

Mewtwo-Mega-X @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Sunsteel Strike  
- Close Combat  
- Beat Up  
- Ice Shard  

Kartana @ Focus Sash  
Ability: Pure Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Sunsteel Strike  
- Petal Blizzard  
- V-create  
- Shell Smash