Heracross-Mega @ Heracronite  
Ability: Guts  
EVs: 252 HP / 252 Atk / 4 SpD  
Adamant Nature  
- Close Combat  
- Rock Blast  
- Pin Missile  
- Protect  

Gothitelle @ Sitrus Berry  
Ability: Shadow Tag  
EVs: 252 HP / 176 Def / 80 SpD  
Bold Nature  
IVs: 0 Atk  
- Trick Room  
- Helping Hand  
- Protect  
- Psychic  

Volcanion @ Assault Vest  
Ability: Water Absorb  
EVs: 248 HP / 56 SpA / 204 SpD  
Modest Nature  
IVs: 0 Atk  
- Steam Eruption  
- Heat Wave  
- Earth Power  
- Overheat  

Landorus-Therian (M) @ Choice Scarf  
Ability: Intimidate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Earth Power  
- U-turn  
- Stone Edge  
- Hidden Power [Ice]  

Diancie @ Weakness Policy  
Ability: Clear Body  
EVs: 252 HP / 252 Atk / 4 SpD  
Brave Nature  
IVs: 0 Spe  
- Diamond Storm  
- Moonblast  
- Protect  
- Trick Room  

Amoonguss @ Rocky Helmet  
Ability: Regenerator  
EVs: 252 HP / 176 Def / 80 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Grass Knot  
- Rage Powder  
- Spore  
- Sludge Bomb