R.O.B. is an unlockable character in "Mario Kart DS", "Super Smash Bros. Brawl", "Super Smash Bros. for Nintendo 3DS" and "Wii U", and "Super Smash Bros. Ultimate", each of which refers to R.O.B. as male. In "Brawl"s adventure mode, , R.O.B. plays a major role in the plot. As part of "Super Smash Bros. for Nintendo 3DS" and "Wii U", R.O.B. has two Amiibo figurines, uniquely produced in both the gray and white NES color scheme and the red and white Famicom color scheme.