Growlithe (M) @ Choice Band
Trait: Flash Fire
EVs: 196 Spd / 196 Atk / 76 HP / 36 SDef
- Flare Blitz
- Close Combat
- Wild Charge
Flare Blitz is a strong STAB. Close Combat covers Rock Types and hits Dark Types hard. Wild Charge covers Water Types and gives good coverage. Crunch is pretty much a filler because it can't learn Extreme Speed and Crunch hits Psychic Types and Ghost Types.
Here's a physically defensive set.
Growlithe (M) @ Eviolite
EVs: 236 HP / 236 Def / 36 SDef
- Fire Fang
- Morning Sun
Fire Fang is the main STAB for damage and doesn't have recoil. Morning Sun is healing. Roar is to rack up hazard damage and Protect is to stall out the opponent more. Will-O-Wisp is to burn physical attackers and make them useless. It also gives amazing physical bulk when paired with Intimidate.