Hacking Software capable of downgrading IOS15?

[Ka1b3ast]

I need to downgrade IOS15 in order to reinstall another IOS but how do I do it?

 

[tswntk]

Boy, aren't your console a WiiU?
Did you read Cyan's advice? - "don't use old Wii system tools to install anything on vWii !" or you will eventually brick your WiiU. Read the stickies for guides to hack your vWii properly. Read it a few time until you understand how the process is working, play specially attentions to the Do's and Dont's. specially, don't do anything randomly and don't use any thing not made specially for vWii.
You absolutely don't want IOS15, 36, 37 etc (in fact any system IOS) patched on your vWii.
also stop making multiple threads on the same subject.

 

[Ka1b3ast]

So im guessing it would be better if I just got a normal wii and used it for riivolution?