This is really odd. But i will say that i have a 3d world preinstalled bundle and the luigi game showed up on the title after i beat bowser.(i think?) I do not have luigi bros, and have never run it either.
But i does load a luigi themed version of the classic mario bros arcade game. Maybe that didn't extract with your wud.
But i does load a luigi themed version of the classic mario bros arcade game. Maybe that didn't extract with your wud.