when you get to the battle fronteir you have to beat each facility a set number of times (3-7or10) and at the end you will find the fronteir brain. Upon defeat they will give you the symbol)-warning they're tough.
for more info go to:
http://bulbapedia.bulbagarden.net/wiki/Battle_Frontier_(Generation_III)
you have to get these symbols it's fun but hard
battle fronteir is a place where you get to go after you beat the champion and you can battle there and win battle points to trade out or you can win symbols and battle points. you cant trade your symbols
Your Trainer Card will change color.
Better is pokemon emerald.you can catch more pokemon-you can catch kyogre and groudon-you can battle with the frontier brains and collect the seven symbols in battle frontier
Talk to Scott to receive a special berry.
getting symbols?
If you speak to Scott (the manager of the Battle Frontier) he will reward you with exclusive Berries.
if you fully beat it (all 7 gold symbols) and talk to scott he will give you a starf berry
yes
YES
battle battle battle battle battle battle
Pokemon emerald is a game based on the Pokemon series..in this game,you can catch pokemon,battle trainers,and trade pokemon.:)