Imagine trying to fight Rule 34 of the Internet. That's a losing battle right from the get-go. There's a reason for the rule and a reason why it'll never stop or be stopped so long as the Internet exists.
I really hope this leads to a drastic, many-fold increase in the amount of Rule 34 content of Nintendo characters. I hope people start tagging them on Twitter with it all. Nothing would make me happier.
This would only serve to advertise their ips, just look at Overwatch. If you really want to fuck with a corporation, the best way is to forget about them.