As you can probably tell, LC is my favorite tier.
This is the set I run:
EDIT: I'm a doofus. Berry Juice outclasses Sitrus Berry.
Magby @ Berry Juice
Ability: Vital Spirit
252 Atk / 252 Spe / 4 HP
If you can set up a Belly Drum, you're set. Fire Punch is STAB, Mach Punch smashes Pawniard, who is slower than Magby. Thunder Punch rounds off the coverage and makes it unresisted in LC.
I REALLY WISH THIS THING HAD IRON FIST