Fantastic job! I really love the face texture on Nunu. Kind of a shame you can't see it well when he's on his Yeti cuz of the scale. I zoomed in on his face in your sketchfab link and the face is painted amazingly!
nice dude! only thing i see is the tones are a bit desaturated and that wireframe is kinda "in your face" maybe a nice either white or black wires? :) love the model