This is a java version of WiiBrickBlocker originaly done by bSr43You can :- Remove Wii Updates- Check if there is an update- Use this tool on all OS (Java)- Patch Region like "RegionFrii"
I don't have a wii u anymore to test it myself, but if homebrews are not visible on the wii u menu I think you can press L + R + minus to open the plugin menu, there should be an option called "homebrews on wii u menu" or something similar