Combusken @ Fightinium Z
Ability: Speed Boost
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Fire Blast
- Focus Blast
- Protect
- Defog

Combusken @ Life Orb
Ability: Speed Boost
EVs: 4 Atk / 252 SpA / 252 Spe
Naive Nature
- Fire Blast
- Focus Blast
- Shadow Claw
- Protect

Additional Moves: Substitute, Rock Slide, Work Up
Additional Items: Firium Z
Notes: Due to the rise of Swanna and Altaria, Shadow Claw one of the best coverage moves it can run for this tier. 
This allows you to lure and beat offensive Grumpig as well as hit less common checks including Lampent and Frillish who don't fear its STAB combination.