Hm... if Garchomp was Dragon/Fighting... yeah it would lack the Twave immunity, but it could potentially get STAB Mach Punch. I know it's low power, but that priority could really help in Pinch situations like against a +2 speed Terrakion, or Cloyster perhaps, being even MORE useful with Swords Dance. Keeping the SR resistance would be awesome though, and in exchange for a electric immunity, Dragon/Fighting is still resistant to electricity, WATER, rock, and only has a 2x weakness to ice.
(Oh, and I'll PM you the privacy stuff)
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(Oh, and I'll PM you the privacy stuff)
EDIT: Done, check your PM inbox.