>>28338879So instead of swapping two weaknesses gaining around 8 resists giving you a ton of switch in options, another STAB that beats common dragon counters all while considering normally Haxorus can't really switch into most fighting/ground type moves already, you want it to stay pure dragon, gotcha.
For the record:
>4 Atk Mold Breaker Excadrill Earthquake vs. 16 HP / 0 Def Haxorus: 153-181 (51.5 - 60.9%) -- guaranteed 2HKO >252+ Atk Landorus-T Earthquake vs. 16 HP / 0 Def Haxorus: 213-252 (71.7 - 84.8%) -- guaranteed 2HKO >0 Atk Garchomp Earthquake vs. 16 HP / 0 Def Haxorus: 148-175 (49.8 - 58.9%) -- 99.6% chance to 2HKO Now bulky grounds with recovery like Gliscor and Hippowdon will 3HKO and they are arguably the only ground types that'd notice a difference if Haxorus turned into a steel type.
Now fighting types
>252+ Atk Conkeldurr Drain Punch vs. 16 HP / 0 Def Haxorus: 156-184 (52.5 - 61.9%) -- guaranteed 2HKO >252 Atk Mega Lopunny High Jump Kick vs. 16 HP / 0 Def Haxorus: 240-283 (80.8 - 95.2%) -- guaranteed 2HKO >240+ Atk Pure Power Mega Medicham High Jump Kick vs. 16 HP / 0 Def Haxorus: 420-495 (141.4 - 166.6%) -- guaranteed OHKO >252 Atk Technician Breloom Mach Punch vs. 16 HP / 0 Def Haxorus: 108-127 (36.3 - 42.7%) -- guaranteed 3HKO >252 SpA Keldeo Secret Sword vs. 16 HP / 0 Def Haxorus: 153-180 (51.5 - 60.6%) -- guaranteed 2HKO Basically only unboosted Breloom would prefer it if Haxorus was steel type, the others don't really give a shit.
Basically a ground+fighting weakness is a good trade off for everything else he'd gain.
