Yeah my insert back is blank as well. My best guess would be that only the first printing of it actually had a printed backside, and then they decided it's cheaper to leave it blank.
With ID number I assume you mean the catalogue number that's listed here? In which case, I can't find it either. I don't think it's on the album anywhere., same with DKC3. I assume the catalogue number came from Nintendo themselves, at the time the album was made available by them?
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