NO !!!!!!!!!!!!!!!
use CycloDS
no
r4ds.cn
It will work if you decrypt the file, but it is easier to use the R4DS cheat editor: http://www.r4ds.cn/download/Cheat_code_editor.html
The related link is how the White R4 looks like, the image being from the R4DS website. The black R4DS has only the colour changed, with no extra letters or pictures on the label. Also, the newest versions of the R4DS firmware won't work on fake versions of the R4.
The R4DS does not support any microSD cards over 2gb. So, sorry, you bought that for nothing. And there is absolutely no way to get it to work so don't bother.
no, but there is no need to, the R4DS has a built in Action Replay.
Yes a Wii remote can work with Wii Fit.
No Wii U games will work on the Wii.
No it is illegal
No. Only Wii discs will work with the Wii console