I've made a tutorial for TCPGecko. It doesn't require servers, compiling, or anything even moderately difficult.
(Wait for 1080p process)
---LINKS & DOWNLOADS---
WNetWatcher: http://bit.ly/1WdWCQC
TCPGecko (Compiled): http://bit.ly/24ziWJF
Loadiine.ovh (For Wii U): http://loadiine.ovh/
Enjoy
This doesn't work for me for some reason.