I already mentioned pretendo in a comment. But for anyone how wants to play super Mario maker on there Wii u after the shutdown. You can switch networks (you of course need to (soft)mod your Wii u).
In super Mario maker uploading, playing uploaded levels, death point, world record and staring them works. There is still a lot missing. But you can still play.
Some games and features are behind a payed beta(which I hate). But all super Mario maker stuff is free.
Seeing wara wara plaza alive on my Wii u is amazing with random Mii’s and post from miiverse.