Actually, the Gamecube/Wii has a different format (GCM) from the standard ISO format. Also Rom (Read Only Memory) can be CD-ROM/DVD-ROM/BluRay-ROM as well, not just chips. I would call any file dumped from w/e media a ROM because it it used for reading only, not to be modified by the program that is using the file.
Pleasure to say that I have finish Wind Walker. I notice that: in the last dangeun the emulator start crashing at the same place ever..... I was playing at 800x600 resolution and dolphin close without error message. Than i change the resolution to the native one (640x480) and it don't crash anymore. I'm using 1614 x86 SVN revision with OGL plugin (in window mode, no render on main window), nothing enabled. The final movie have sound!!!!!