Blissey (F) @ Leftovers  
Ability: Ice Scales  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Jungle Healing  
- Spectral Thief  
- Will-O-Wisp  
- Teleport  

Zygarde-Complete @ Rocky Helmet  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
IVs: 0 Atk  
- Haze  
- Shore Up  
- Body Press  
- Stealth Rock  

Arceus-Fairy @ Leftovers  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Haze  
- Roost  
- Knock Off  
- Defog  

Rayquaza @ Life Orb  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Tail Glow  
- Substitute  
- Oblivion Wing  
- Moongeist Beam  

Mewtwo-Mega-Y @ Choice Specs  
Ability: Psychic Surge  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Expanding Force  
- Volt Switch  
- Earth Power  
- Switcheroo  

Slaking @ Silk Scarf  
Ability: Normalize  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Fishious Rend  
- Shift Gear  
- Haze  
- Imprison