Interesting (somewhat related) side note about the Virtual Console games: they are emulation shells around the original ROMs. There are toolkits out there that

Interesting (somewhat related) side note about the Virtual Console games: they are emulation shells around the original ROMs. There are toolkits out there that will let you peel them apart and see / replace the resources inside. I used this to swap out one ROM for another so I could play the Nintendo NES version of Tetris on my Wii.