Solatorobo: Red the Hunter

In a world filled with robots, giant hermit crabs, and kitten pirates, everyone has jobs they need done. That is where hunters come in; picking up trash, organizing warehouses, and defeating mercenary armies, for a price. One hunter, Red, was following up a tip on a valuable piece of jewelry when he ran afoul of the Kurvaz gang. He was able to locate the jewelry, but just got himself into more trouble when he apparently unleashed a gargantuan monster into the world. (Mobygames)