you can't unless you playing 2 player
New Super Mario Bros.- You hold L and R. While holding, press Start. Mario should transform into Luigi.
You can't be first player because it makes you be mario, but if you are second, third, or fourth you can choose.
Hit 2 player, or you have to play the lost levels
Normally select a file on "select a file" screen.
On new super Mario you hold down l and r at the same time when you hit the game file
Watch the video that the related link goes to. I didn't make the video.
nothing
As far as I know you can't, but you can turn into Luigi!
you need a certain suit
You can sort of, you have to be super guide and whilst you're on super guide click pause and play now, you are then playing as luigi super guide!
if you are talking about new super Mario bros wii.then the only way to get there is to beat all the other worldsYou have to get ALL the star coins in each world and level, then you can go to world 9.
find a Blue Shell for Mario Make luigi hit Mario with a Hammer in a shell near Somting i do not know