Chat GPT, an SD card, USB SD card reader and a computer. It's definitely worth it. I had my Wii U for like a year before I modded cos I was too scared of bricking but it pays off massively.

Guy needs chatgpt to mod a wii u im crine Do not use chatgpt, go to wiiu.hacks.guide on ur browser and follow that

Blud chatGPT has access to these sites and can give you links to them. used it to mod mine >:(