>>46304459actually, through a little research, Nintendo never used the Nintendo seal on platinum or diamond/pearl, not sure about anything after as I don't own a copy from after sealed still.
when you open it, if you look at the manual, the cover is very discolored and the pictures inside of it are very low res and blurry, the original had clear screen grabs and the cover of the manual was identical to the cover of the case.
also the front of the cartridge code is NTR-CPUE-USA (Which just means its platinum) and the back likely is CPUEEN0J05 (this is the fake one that the repro factory used on my copy)