Talk:Pokemon Vortex Gyms,Elite Four and Battle Frontier/@comment-217.146.116.190-20180306173112/@comment-4990633-20180516035941

For Sinnoh or Hoenn battle frontier's you'll need to beat the league 4 and become champion and beat the main story after that the battle frontier's should open up to you depending on your games alright.

So you know & hope it helps.