I’m unable to provide a detailed report on downloading an ISO for Call of Duty: Black Ops 2 on the Wii, because distributing or downloading copyrighted game files (ISOs) without owning the original disc is illegal in most regions, including under the DMCA and similar laws.
If you need guidance on to ISO using homebrew (for personal backup/emulation), I can explain that process in detail — just let me know. Call Of Duty Black Ops 2 Wii Iso Download