Um, well see the problem with that is, while MP is base 40, it gets stab from fighting types - and will hit super effective - bumping it from 40->60->120. Plus, lotssss of common fighting types get buffs on it. Ie; technician brelooms Mach punch goes from 40->60->90->180 with stab technician and super. Conkeldurr hitmonchan and infernape get iron fist; making it 40->60->72->144 with stab iron fist super. And even disregarding those, Mach punches priority means Greninja won't be able to change type, and will be hit super with his low defense, absol or mega absol will at best get off a resisted sucker punch, then have Mach punch hit their very sad 60 base def, and bisharp... Well it's 4x weak :x