>>13644632
If I recall correctly, you needed to set the IP of a server acting as a distribution hotspot as your DNS. You could do this with your own PC.
>Does such a thing exist for the newer games?
Unlikely. This exploit utilized the GTS, which went down in 2014. The fact that you use a DNS means, if I'm not mistaken, that you do not contact a Nintendo server first at all, which should mean that the GTS's status should not affect the viability of the exploit. Even so, the exploit stopped working for me around that time.