The Mii 's weight class depends on its height and weight ( this can be customize in the Mii Channel ) , and its favorite color changes the color scheme of its clothing , while the gender changes the color scheme of their cars . The Mii 's weight class depends on its height and weight ( this can be customized in the Mii Channel ) , and its favorite color affects the color scheme of its clothing , while the gender affects the color scheme of their vehicles .