Mawile @ Mawilite  
Ability: Simple  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Extreme Evoboost  
- Sunsteel Strike  
- Ice Shard  
- Power Trip  

Groudon-Primal @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Thousand Arrows  
- Searing Sunraze Smash  
- Soul-Stealing 7-Star Strike  
- V-create  

Steelix-Mega @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Shore Up  
- Haze  
- Thousand Waves  
- Destiny Bond  

Greninja-Ash (M) @ Pixie Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Photon Geyser  
- Judgment  
- Shell Smash  
- Taunt  

Audino-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 252 SpD  
Bold Nature  
IVs: 0 Spe  
- Defog  
- Stealth Rock  
- Recover  
- U-turn  

Mewtwo-Mega-X @ Fairy Memory  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Photon Geyser  
- Multi-Attack  
- Thousand Arrows  
- Moongeist Beam