Heracross-Mega @ Heracronite  
Ability: Guts  
EVs: 236 HP / 252 Atk / 20 SpD  
Brave Nature  
IVs: 0 Spe  
- Protect  
- Rock Blast  
- Pin Missile  
- Close Combat  

Heatran @ Charcoal  
Ability: Flash Fire  
EVs: 252 HP / 252 SpA / 4 SpD  
Quiet Nature  
IVs: 0 Atk / 17 Spe  
- Eruption  
- Earth Power  
- Solar Beam  
- Protect  

Cresselia @ Mental Herb  
Ability: Levitate  
EVs: 252 HP / 88 Def / 40 SpA / 128 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Psychic  
- Skill Swap  
- Sunny Day  
- Trick Room  

Mawile-Mega @ Mawilite  
Ability: Intimidate  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 8 SpD  
Brave Nature  
IVs: 0 Spe  
- Protect  
- Play Rough  
- Rock Slide  
- Sucker Punch