It can be pretty hard to beat it because you have to pass difficult challenges before facing the frontier brains. It took me weeks when I finally got all seven gold symbols. The best way to do it is to get lots of lum berries, many pokemon, held items, and learn about all pokemon in the game. A good suggestion is to take notes on the pokemon your up against because many of the same pokemon you face before is used again by a different trainer. Get pokemon like gardevoir and raise its defenses cause I used her in battle and won lots of times.
you have to beat the battle frontier brain
Get all of gold symbols from Battle frontier.
nothing happens. you just beat the battle frontier that's all.
Battle them and Beat them.
Go to the S.S tidal after you beat the league and it will say Battle Frontier
You need the simbols
beat the frontier brains
It is at the battle frontier after you beat the eliete 4.
You can get to the battle frontier after you beat the Elite Four
after you beat a certain amount of challenges you will battle a frontier brain which is sort of like the gym leader. if you beat them you get a symbol
You can't beat the frontier. Mostly because they just see how long you can keep winning in each of the battle areas.
you half to beat the elite four and go in the ferrie in lilycove and click on battle frontier