User blog comment:PitchBlack696/Brute Tigrex/@comment-203.82.80.13-20110130063018/@comment-3347301-20110203200429

Well, Gravios takes 80% damage when its belly is broken (well, that's at least what I know) but only 30% or so when not broken. Diablos' belly takes 77% damage, for comparison with Gravios. (For Impact Weapons such as the Hammer, for both these monsters.) Well, Gravios' belly might be a little weaker than Diablos' belly, but you'd slaughter 3 Diablos before you even got to the first layer, let alone breaking the belly twice and getting able to inflict 80% damage on Gravios...