I love the way you handled giving the characters extra flair and style, through the use of posing, colors and your own personal style. There is a nice contrast between the look of ZX8000 having curvier looking outlines and a more cheerful expression compared to Badbert's more ferocious stance and sharper edges (if that makes sense). They both also have nicely defined and interesting silhouettes.
And that background just looks badass. Very awesome piece of art!