Regigigas @ Safety Goggles  
Ability: Wonder Guard  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Extreme Speed  
- Sunsteel Strike  
- Spore  
- Shell Smash  

Rayquaza-Mega @ Life Orb  
Ability: Mold Breaker  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Clangorous Soulblaze  
- Substitute  
- Shell Smash  

Mewtwo-Mega-X @ Life Orb  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Jolly Nature  
- Photon Geyser  
- Beat Up  
- Sunsteel Strike  
- Ice Shard  

Gyarados-Mega @ Lum Berry  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Spectral Thief  
- Shell Smash  
- Power Trip  
- Sunsteel Strike  

Deoxys-Attack @ Focus Sash  
Ability: Magic Guard  
EVs: 252 Atk / 252 SpA / 252 Spe  
Lonely Nature  
IVs: 0 HP / 0 Def / 0 SpD  
- Shell Smash  
- Photon Geyser  
- Mind Blown  
- Light of Ruin  

Groudon-Primal @ Choice Scarf  
Ability: Shadow Tag  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- V-create  
- Thousand Arrows  
- Stealth Rock  
- Trick