Mawile Gen5

Defensive:

Mawile @ Leftovers
Ability: Intimidate
Happiness: 0
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Stealth Rock
- Iron Head
- Toxic / Swords Dance / Sucker Punch
- Baton Pass



Wallbreaker:

Mawile @ Life Orb
Ability: Sheer Force
EVs: 252 Atk / 4 SpA / 252 Spe
Naughty Nature
- Swords Dance / Thunder Punch
- Iron Head
- Sucker Punch
- Fire Blast / Ice Fang

AoA works fine, as does Swords Dance. If you go full physical, remember to swap to Adamant!