you cannot do it
You can't
yes just hold the B button on the tittle screen its as easy as that!
Peach tells you and you immediately can go!To play you have to get all the star coins.
No.
No,only Mario and after you progress a while, Luigi.
:(
Unfortunately, you can't play as Peach in New Super Mario Bros. Wii.You can play as her in the American Super Mario Bros. 2, which (as far as I know) is available on Virtual Console.
If you mean New Super Mario Bros. U, you can play it on Wii U
If one is interested in playing Super Mario Brothers online, it is recommended to check out the My Real Games website, or the official Online Super Mario websites. Both of these sites allow for one to play Super Mario Brothers online.
you can not play as Yoshi in new super Mario bros DS
No you can play as Mario and Luigi.
you can play mario bros with portal gun online