In Tekken 4, Roperto has short brown hair. In Tekken 5 he has shaven the back, and the sides of his head leaving only the top untouched.
In Tekken 4 Roperto has white shorts with black lines on the sides, and on the belt area. The shoes match the color-scheme of his pants, with mostly white, and black lines. His boxing gloves are blue.
In Tekken 5, the shorts stay the same, but now it also has a red "Agei" logo on the left side. The shoes stay the same. Boxing gloves are now red.
Roperto fought Steve Fox in the boxing ring, Steve knocked Roperto out without being hit once.