Mass backing up saves, or so I heard (never tried) -- since you can just read all files on mlc/usb...
Injecting your own rom into VC games, and also injecting your own icon and boot screen.
There's a lack of tutorials on everything though. Until someone generously makes one.
The GUI version of WUPclient is useful, and works just for what you want it for.
for me its same with installing homebrew channel on the vwii withount a gamethat's my best use though
d̶u̶m̶p̶i̶n̶g̶ ̶g̶a̶m̶e̶s̶ ̶w̶i̶t̶h̶o̶u̶t̶ ̶l̶o̶a̶d̶i̶n̶g̶ ̶t̶h̶e̶ ̶h̶o̶m̶e̶b̶r̶e̶w̶ ̶l̶a̶u̶n̶c̶h̶e̶r̶you know any other ones for sure