Now at the eShop you can pick up Super Mario Bros 2 for half-off if you have already purchased and downloaded Super Mario World. This offer ends 9.am. PT on May 23rd, 2013.
To qualify for the offer, you must first purchase (or upgrade to) the Wii U Virtual Console version of Super Mario World before purchasing the Wii U Virtual Console version of Super Mario Bros 2.
This is a great deal for any Mario fan out there wanting to add more Mario games to their Wii U library.