Heatran @ Firium Z  
Ability: Flash Fire  
Level: 50  
EVs: 4 HP / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Eruption  
- Protect  
- Earth Power  
- Heat Wave

Unown
Options:
- offensive: Flash Cannon, Flamethrower, Overheat
- supportive: Substitute, Taunt
- item: Shuca Berry, Charkoal

Unown
Offensive calcs:
- 252 SpA Heatran Inferno Overdrive (200 BP) vs. 4 HP / 0 SpD Tapu Lele: 153-180 (104.7 - 123.2%) -- guaranteed OHKO
- 252 SpA Heatran Eruption (150 BP) vs. 0 HP / 0 SpD Regieleki: 165-195 (106.4 - 125.8%) -- guaranteed OHKO
- 252 SpA Heatran Earth Power vs. 252 HP / 4 SpD Mega Dhelmise: 90-108 (50.8 - 61%) -- guaranteed 2HKO

Unown
Useful partners:
- speed control: Mega Toucannon, Whimsicott, Regieleki