>>20431580>>20431583If it was because of leaks, Nintendo would probably just blacklist the offending stores/chains and call it a day. It makes no practical business sense to be petty on this great a scale and the stores would miss out on a lot of money.
Also, Canada's getting it at the same time as everywhere else and that was the other major source of leaks. It's probably due to dummying the Game Corner out (the original Japanese version of HGSS kept the Goldenrod and Celadon Corners).