This is not responsible disclosure. The person who discovered this vulnerability should have notified nintendo and given them enough time to respond with a patch.
Think about how many hard-earned coins and power ups could potentially be lost due to malware that takes advantage of this vulnerability.
Heh, after I read your first two sentences and was ready to downvote you (having had "bad experiences" with "responsible disclosure").
After I read the last sentence, I imagined 10-year-old me playing Super Mario Brothers and suddenly freaking out because all my coins were just hacked and stolen.
Think about how many hard-earned coins and power ups could potentially be lost due to malware that takes advantage of this vulnerability.