>>32192535>252+ Atk Ledian Fire Punch vs. 252 HP / 16+ Def Filter Aggron-Mega: 28-34 (8.1 - 9.8%) -- possibly the worst move everMultiply that by 4, and you're looking at 32.4 - 39.2%, almost a guaranteed 3HKO on a non-STAB. In comparison:
>252 Atk Tyranitar-Mega Earthquake vs. 252 HP / 16+ Def Filter Aggron-Mega: 84-100 (24.4 - 29%) -- 99.6% chance to 4HKO>252+ Atk Mewtwo-Mega-X Earthquake vs. 252 HP / 16+ Def Filter Aggron-Mega: 103-123 (29.9 - 35.7%) -- 31.5% chance to 3HKO>yfw Megas with massive Attack stats and better coverage moves don't hit as hard as a Comet Fists Ledian 