Diggersby

Diggersby isn't necessarily a bad wallbreaker; in fact, it's actually quite difficult to switch into. Its main issue, however, is that it faces immense competition from other wallbreakers such as Mega Medicham, Mega Mawile, and even Hoopa-U. Diggersby's below average Speed stat and subpar defensive typing leave it very vulnerable to common offensive threats such as Greninja, Kartana, and Kyurem-B. Its mediocre bulk is also problematic because anything it fails to OHKO will most likely deal a heavy amount of damage to it, so it will often be dead weight against offensive teams. Overall, Diggersby has almost nothing to distinguish itself from the plethora of other wallbreakers in the tier, and there's just very little reason to use it over something else.