I can't say for sure what Metagross has, but at least I can provide Sharpedo info.
Mild / Life Orb / Speed Boost
- Hydro Pump
- Crunch
- Ice Beam
- Protect
56 Attack / 252 Sp. Attack / 200 Speed
Hitting as hard as it possibly can on the special side (without Specs), Sharpedo probably would have killed Metagross. The thing had 42% when it died, and I think Hydro Pump would have easily done the 60% necessary in that scenario.

Mild / Life Orb / Speed Boost
- Hydro Pump
- Crunch
- Ice Beam
- Protect
56 Attack / 252 Sp. Attack / 200 Speed
Hitting as hard as it possibly can on the special side (without Specs), Sharpedo probably would have killed Metagross. The thing had 42% when it died, and I think Hydro Pump would have easily done the 60% necessary in that scenario.