Your remote doesn't have an aspect ratio change button? Most (or likely, all) modern TVs let you display non-natively 16:9 stuff in widescreen that way.
My TV remote has those buttons, sure. Changing it makes no difference, though. The Wii U forces my Virtual Console games to display at the native 4:3 dimensions, while the original Wii let you change between 4:3 and 16:9.