In addition, GameBanana has an entire section filled with tutorials on this sort of thing on how to get mods to Smash for Wii U. Here are several tutorials for running mods on Super Smash Bros. 5.5.2 is the best version to load mods, and I still currently use it to do so. Depending on your version, however, (which you haven't clarified) I don't know if features such as SD Caffiine are available. This method installs a temporary patch on the Wii U, so therefore, the patch gets removed every time you shut off the console (however, you're required to access the loadiine menu every single time you want to boot the game). The easiest, risk free way to mod a Wii U is to load loadiine.ovh through your Wii U's internet browser. Initially, it sounds like you just want to load mods on the Wii U via the topic title but you stated in your post you want to mod the Wii U menu? And additionally, your response to the above post means you simply want to load mods on your Wii U? I'm not sure exactly what you're asking in this topic.

Wii u smash bros mods