I'd kill Pikachu then use its thunder sack to make a Heaven's Thunder long sword. As seen in monster hunter. Of course i'd only be starting with pikachu, since i would prolly need many other parts. raichu, electabuzz, ampharos, zapdos, raikou, zekrom, they would all be on the list.
might as well make a set of armor while im at it. Tyranitar armor would look cool.