Thanks in advance.
You will need to find who uploads the ISO required, You can select US version or Japanese version
Then you will need something called gttool, which are still able to find from https://mega.co.nz/#!OwBXnZ5R!nG8dq3ixNu5zDOu-uZmpw_Q5EkHJt8FkZ9_rg0l7FrQ
I personally don’t know how, at last, I got 200 bgms in ac3 from GT6 US version.