Ugh, well...I didn't get up to 70, but I managed to get to 68 in Super Multi. This was actually my first attempt with this combination.
My lead:
Jolly Medicham @ Medichamite
Pure Power
IVs: 31/31/31/x/31/31
EVs: 252 Atk, 252 Spd, 4 HP
Fake Out
Detect
Drain Punch
Fire Punch
Mega Medicham...