I heard from somewhere that the Clakkerz left their mysterious origins for unknown reasons (there's a fanfic epic in there somewhere, if only someone took an interest in the species) and journeyed across Oddworld. They built their towns wherever their wagons happened to break down.
The outlaws seem to have a predatory, or at least parasitic, society. They settle wherever there is prey. A host settlement, unable to adequately defend itself, off of which they live. At least those that we've met, at any rate. Blisterz Booty was a (possibly part-time) poacher, as was Lefty Lugnutz, though Lefty wasn't in quite the same league.
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