The Battle Frontier is a special post-Pokémon League area in Pokémon Emerald that features several arenas where powerful Trainers can battle each other.
The Battle Frontier replaces the Battle Tower in its location south of Route 130, and likewise is only accessible by taking the S.S. Tidal from Lilycove City or Slateport City. Unlike the plain Battle Tower in Pokémon Ruby and Sapphire, as well, each of the facilities in the Battle Frontier has a leader, the Frontier Brain, who may be challenged after certain winning streaks have been made through their respective facilities.
Game view
As you know -
Upon the player's first entry into Hoenn's Battle Frontier, their Trainer Card will be upgraded into a Frontier Pass by a woman at the entrance. This pass holds the Trainer Card, as well as a small map of the Battle Frontier and the player's records with the Frontier. Saved-up Battle Points, or BP, are listed, as are any of the seven Frontier Symbols the player has won. One battle from within one of the facilities may be recorded and stored on the Frontier Pass, which may be watched or overwritten with another at any time.
On winning through a set amount of battles in any given facility, Battle Points will be awarded, usually in small amounts, but gradually growing through each consecutive streak. Defeating the Frontier Brain of a given facility for the first time awards the silver Symbol of that facility, as well as 10BP, while the second defeat of the same Brain gives the Symbol a golden color and the player another 10BP. The Frontier Brain will only appear in 3-vs-3 single battle mode.
No two Pokémon entered can hold the same item, though all items are allowed to be held (even if they would have no particular reason for being held). Items cannot be used from the Bag during battle. Battles conducted here do not award experience or money. Any Pokémon can be entered for battle, accepted legendaries.
My like -
My favorite is Battle tower because is the most standard of the facilities. Like before, it features a standard 3-vs-3 single or 4-vs-4 Double Battle format, with straight runs of 7 Trainers that get progressively more powerful as the player goes on.
At the 35th and 70th battle, five and ten runs through, respectively, Salon Maiden Anabel, the Frontier Brain, appears. If she is defeated, she awards the Ability Symbol.
All multiplayer functions found in Ruby and Sapphire are retained, as well. For a detailed description of these, see Battle Tower (Hoenn). Through a glitch, players may exploit the Battle Tower in Emerald to clone their Pokémon. And there are many and many features to enjoy. Without any lakes it make my favorite one in Battle Frontier.