One you can gloat to others you did it, Two the battle points you receive can give you cool and rare items, Three do you remember Scott the guy who brought you to the battle frontier well he lives somewhere in the frontier if you show him your symbols he will give you two super mega rare berries.
Chat with our AI personalities
Whatever you want you can try the battle frontier train your Pokemon etc.
Talk to Scott to receive a special berry.
4D2A5A81 4E69A107 Battle Frontier
There is no Battle Frontier in Pokemon Diamond and Pearl. Only the Battle Tower.
Its not at Battle Frontier, its at Pacifidlog Town