Use the following trick for easy weapon experience and bolts. After you get to the Clone Factory, Quodrona, go back to Technomite City, Challax. Go through the board with the weapon you want to level up. When you run out of ammo, buy it on the PDA. Afterwards, go to Farming Cooperative, Dayni Moon and do the same thing. Then, go to the Clone Factory, Quodrona and fight through there. However, do not fight Otto. Repeat this process as many times as desired, You will level up once at least each three planet course and get at least 50,000 bolts (500,000 bolts in Challenge mode).