wii generators work when the cables are down?

Answer 1

The Nintendo Wii does not include generators. However I hear the Switch might have included that functionality.

Answer 2

generators are its own source of energy/electricity, therefore it will supply you with energy for whatever you plug into it

Answer 3

I don't think that you asked the question you wanted to ask.  Since you misspelled "will", it thought you were asking a Nintendo question.