>>23024992Cont.
The kicker with this set is that it's able to function well against other things in OU as well, so it's a decent lure. If Diancie decides it's going to be cocky and attempt to sweep you with Earth Power (a high possibility) it will only do about 1/3 of its health, allowing you to OHKO. If it switches out into the omnipresent Landorus-T, use Ice Punch. Or you could predict and do a double switch, or use Stealth Rock if you don't already have it. Thunder Wave is also an amazing support option for Aggron, allowing you to fuck over sweepers or just about anything that switches in (just be careful that Diancie doesn't stay in for that).
Fire Punch is an option if you already have a Stealth Rock user and you have trouble with Scizor/Ferrothorn, which occasionally switch into Aggron. Earthquake is great for Heatran.
-1 0 Atk Mega Aggron Ice Punch vs. 0 HP / 24 Def Landorus-T: 204-244 (63.9 - 76.4%) -- guaranteed 2HKO
252 Atk Landorus-T Earthquake vs. 252 HP / 16+ Def Filter Mega Aggron: 114-136 (33.1 - 39.5%) -- 100% chance to 3HKO
0 Atk Mega Aggron Earthquake vs. 248 HP / 0 Def Heatran: 368-436 (95.5 - 113.2%) -- 75% chance to OHKO
0 SpA Heatran Lava Plume vs. 252 HP / 240 SpD Filter Mega Aggron: 150-177 (43.6 - 51.4%) -- 57.4% chance to 2HKO after Stealth Rock
0 Atk Mega Aggron Fire Punch vs. 248 HP / 0+ Def Mega Scizor: 200-236 (58.3 - 68.8%) -- guaranteed 2HKO
+2 84 Atk Mega Scizor Superpower vs. 252 HP / 16+ Def Filter Mega Aggron: 168-198 (48.8 - 57.5%) -- guaranteed 2HKO after Stealth Rock
