When playing as Kharg in the beginning of the game, after going through the entire Banjo, Lloyd, Spirit Stone scenes, go to the bottom-left of Yewbell to the refinery. Talk to the man outside and he will say he is waiting for Banjo so he can unlock the shop. He asks you to go find Banjo. Say "Yes", then go to the item shop. He will be in the upper-right corner. Talk to him, and he will give you the Knuckle Guard. It increases only Kharg's Defense and Guard,and it is a good weapon part at the beginning of the game. When you no longer want it, sell it for 350 G.