First you need to use wii.cs tools called
WadMii.exe (you can run this in wine on MacOSX or Linux) and point it at the .wad file and give it an extract location.
This will generate a bunch of .app files, you will notice each of these .app files has the file header of “55 AA 38 2D” or U.8-.
You can use a GUI tool such as
U8Mii.exe or a command line interface such as
You can download ARCTool here: http://wiibrew.org/wiki/ARCTool
Line Attack example:
python ARCTool.py ./lineattack/00000002.app