At a BP cost of zero, this badge allows Mario to dress up as Luigi, donning a green hat and shirt with the same blue overalls and brown shoes. Wearing both L Emblem and W Emblem, a badge that dresses Mario up in Wario's clothes, will result in Mario wearing Waluigi's clothes, wearing a purple hat and shirt with black overalls and orange shoes.
This badge is found in Poshley Sanctum. In the sanctum, this badge is at the top of the second portion. Mario must climb up all of the way using his spin jump technique. L Emblem is used to complete the trouble "I wanna meet Luigi."