Mewtwo-Mega-Y @ Choice Scarf  
Ability: Shadow Tag  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Thunderbolt  
- Steam Eruption  
- Grass Knot  
- Sludge Wave  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Arena Trap  
EVs: 252 Atk / 92 Def / 164 Spe  
Adamant Nature  
- Low Kick  
- Beat Up  
- Dragon Ascent  
- Sacred Fire  

Mewtwo-Mega-X @ Expert Belt  
Ability: Shadow Tag  
EVs: 120 HP / 252 Atk / 136 Spe  
Jolly Nature  
- Gear Grind  
- Play Rough  
- Thousand Arrows  
- Drain Punch  

Deoxys-Speed @ Shed Shell  
Ability: No Guard  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sing  
- Sheer Cold  
- Gastro Acid  
- Stealth Rock  

Rayquaza-Mega @ Sky Plate  
Ability: Aerilate  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Sacred Fire  
- Spikes  

Chansey @ Eviolite  
Ability: Imposter  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Wish  
- Lunar Dance  
- Whirlwind  
- Stealth Rock