After you beat X'Plosives turn him in but don't get another bounty. Go outside and talk to townsfolk. You will ask them where X'Plosives got all his weapons. On the side of the road there will be a female clakker. If you talk to here she will give you the password to the black market. The market is located up the street from the Bounty Store. In the market you can buy Wasps, Bola Blasts, a Regen Upgrade, Stamina Upgrade, and Steel Knuckles.