User blog comment:PitchBlack696/Monster Hunter Portable 3rd/@comment-68.145.187.205-20110115035951/@comment-3313096-20110115084230

there is a %-chance to get the monstermats, wich u can ingrease by breaking the parts like claws, horns, tails etc. Other items have a higher chance to get when killing and carving a monster, and others when u capture it. So most time it's just luck. But u can ingrease ur luck getting rare items, or more items, by hunting under the effekt of: Luck, Great Luck, Felyne lucky cat, Mega lucky Cat, Capture expert etc.