Had another thought while rummaging around on ebay. I was unable to find a japanese variant of both Koga and Giovanni. It seems they cut off production of these two, there isn’t even a listing of why on Bulbapedia, only shows decks 1-4, Sabrina’s and Blaine’s, which I also find odd that they skipped koga and put in the 7th gym instead.
My apologies if this has been answered previously, I was unable to find a previous thread on this subject.
Cheers!