Hacking Internet connexion to format the Wii U?

[Keylogger]

Hello

I want to format my Wii U but the console wants to connect to internet... I am on 5.3.2 and I don't want the console to be updated...

Can I connect my Wii U to internet and format it without updating?

 

[Seelbreaker]

unplug your router, disable all wifi connections and there you go.

 

[Cruguero]

In the 3ds you can connect to internet and format without update if asked