How I got Smash Bros 4 Posters Sent to my House

In 2015, an exploit surfaced for the old school Club Nintendo. Basically, they allowed you to redeem coins by registering your console&rsquo;s serial number, but they wouldn&rsquo;t check whether the number was actually real. What I did is that I made a little python script that bruteforced many serial numbers. To my surprise, it worked: I got enough coins to redeem for a set of Smash 4 posters…