Reusing the old Battle Frontier is killing two birds with one stone. Development time can be used to add to and improve other aspects of the game, while a post-endgame sidequest can still be included. This also maintains compatibility with Platinum, and allows those who didn't purchase it to experience the Battle Frontier.
Carrying over the old frontier was the most logical option. Be content with the fact we get one in the first place.
I can only find these but that only prove it have the same overworld sprite
...still...they could change a bit the poke the brains used or that the BF is a mark to Johto and Sinnoh ..that could make it logic for kanto poke to be shipped to sinnoh
..,,,That why I was confuse...they all claimed that the brains are the same
Who claimed it?