Gameloft includes a brief description of Spearster on their Monster Life mini site:
One of spearster’s biggest frustrations in life is finding a pair of pants that fit. As snakes have no hips or legs, this is actually incredibly hard to do. Still, Spearster continues to try, checking shop after shop for that elusive pair of slacks. What does a snake need pants for, you ask? Good question. Truth be told, we don’t really know either.