Heatran @ Leftovers  
Ability: Flash Fire  
EVs: 252 HP / 92 Def / 164 Spe OR 252 SpA / 4 SpD / 252 Spe  
Timid Nature OR Modest Nature
IVs: 0 Atk  
- Magma Storm / Blue Flare  
- Earth Power  
- Toxic  
- Stealth Rock

Heatran @ Leftovers  
Ability: Flash Fire  
EVs: 252 HP / 136 SpD / 120 Spe  
Calm Nature  
IVs: 0 Atk  
- Lava Plume / Magma Storm
- Doom Desire  
- Earth Power  
- Stealth Rock / Toxic / King's Shield