Contrary to popular belief, huge power does not double the base attack stat. Huge power doubles the actual attack stat of the Pokemon. That is why Diggersby could be a possible OU candidate for this generation.
In this set, I focus mainly on Diggersby being able to stay alive while being able to sweep decently. With a below average base speed stat of 78(compared to the rest of the metagame), it is more important for Diggersby to be able to take a few hits rather than outspeed. Hence, the leftovers and investment in health.
EdgeQuake gives Diggersby great coverage as well as a STAB Return.
Wild Charge is for getting rid of pesky water/flying types trying to switch into an earthquake or stone edge.
The way to use this set is pretty simple.
2) Choose appropriate move
3) Watch opposing Pokemon's HP drop to 0.
4) Repeat from step 1.
Warning: This Pokemon will get demolished by decent fighting types or grass types. Make sure to switch into a fighting-check like Trevenant if any of them try to switch in.
Chesnaught - Chesnaught will be able to wall most moves from Diggersby and return a few STAB grass/fighting moves. WATCH OUT!
Mega-Medicham - Great attack stat and decent speed. Expect a (most likely OHKO) STAB fighting move from this before you get a chance to attack it.
Diggersby @ Leftovers
Ability: Huge Power
EVs: 160 HP / 252 Atk / 96 Spe
- Wild Charge
- Stone Edge