Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 124 Atk / 132 SpA / 252 Spe  
Naive Nature  
- Diamond Storm  
- Moonblast  
- Hidden Power [Grass]  
- Stealth Rock  

Greninja @ Choice Specs  
Ability: Battle Bond  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Hydro Pump  
- Dark Pulse  
- Water Shuriken  
- Spikes  

Heatran @ Leftovers  
Ability: Flash Fire  
EVs: 252 HP / 136 SpD / 120 Spe  
Calm Nature  
- Magma Storm  
- Toxic  
- Earth Power  
- Stealth Rock