After bagging X'Plosives but BEFORE taking on a new bounty, Stranger will have the option to ask townfolk about where X got all his weapons. On the side of the road there will be a female clakker who knows about a black market in town, and she then tells you the password.
The Black Market is located up a rope across from the Bounty Store. Go down the hallway, recite the password, and gain aceess. The store's items include: Bola Blasts, Wasps, Regen Upgrade, Stamina Upgrade, and Steel Knuckles.

If you want to select your level, start a new game and enter the following Player Name:

(c)@(r)&

That's copyright symbol, followed by @, followed by Registered Trademark Symbol, followed by &.Y