Gyarados-Mega @ Smooth Rock  
Ability: Sand Stream  
Level: 99  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Dragon Tail  
- U-turn  
- Shore Up  
- Spectral Thief  

Deoxys @ BrightPowder  
Ability: Sand Veil  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Focus Blast  
- Tail Glow  
- Psycho Boost  

Diancie @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Baneful Bunker  
- Worry Seed  
- U-turn  
- Wish  

Sceptile-Mega @ Dragonium Z  
Ability: Sand Rush  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Tail Glow  
- Spectral Thief  
- Clanging Scales  
- Blue Flare  

Zygarde-Complete @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Core Enforcer  
- Haze  
- Shore Up  
- Rapid Spin  

Regigigas @ Leftovers  
Ability: Sand Veil  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Taunt  
- Power Trip  
- Sunsteel Strike