>>13786420>bulky pokemonNo.
A Pokemon with a 55 base special defense is not bulky, even with a good defensive typing. Steel, fighting, water, fire, ground, and electric are all common attacking types in OU, and with the new type changes, Mawile also worries about Dark and Ghost.
If I want a powerful yet slow Pokemon that can take hits, I would use Guts/Sheer Force Conkeldurr. In fact, there are plenty of Pokemon with more bulk and, while they don't have their attack doubled, it's compensated with the use of an item and another, albeit lesser, ability. Other Pokemon can have their attack boosted by weather, for example, Keldeo's and Gyarados's water moves are boosted by 50% in rain.
So remind me again when I have a Mega stone that I am only allowed to use ONCE in a team, I would use it on Mawile? Or Charizard for that matter.