The non cool thing about the battle frontier is you can't enter legendary Pokemon however you can go around that rule by having the following Pokemon: Regice, Registeel, Regirock, Articuno, Zapdos, Moltres, Raikou, Suicune, Entei, Latios, Latias. For some reason those are the only exceptions to the rule of legendary Pokemon maybe because the rest of the legendaries are overly powerful.
Some legendary Pokemon can't enter.
Palkia is not qualified to enter the battle tower tournament, this rule remains unchanged to all legendary Pokemon except pseudo-legendary Pokemon such as Articuno, Zapdos, Moltres, Entei, Raikou, Suicune, Regirock, Registeel, Regice, Latios, Latias, Mesprit, Uxie, Azelf, and Cresselia. All others are not permitted to enter.
== == Beat the elite 4, go to battle frontier, battle tower and then, go to the east an then, enter the house with the glass door. Talk to the girl and, trade her a skitty for a meowth. :)
You walk in.
to enter the elite four
Some legendary Pokemon can't enter.
go to the old lady in battle tower in battle fonter and she make you enter codes.
You can, unlike other games in the series. You just have to leave and re-enter the room, and Kyogre will be there for you to battle again.
After you beat the elite 4 you can battle wally at the end of victory road after you beat him exit then enter and his Pokemon will be stronger
Palkia is not qualified to enter the battle tower tournament, this rule remains unchanged to all legendary Pokemon except pseudo-legendary Pokemon such as Articuno, Zapdos, Moltres, Entei, Raikou, Suicune, Regirock, Registeel, Regice, Latios, Latias, Mesprit, Uxie, Azelf, and Cresselia. All others are not permitted to enter.
yes you can
== == Beat the elite 4, go to battle frontier, battle tower and then, go to the east an then, enter the house with the glass door. Talk to the girl and, trade her a skitty for a meowth. :)
talk to Archie in mt.pyre then you will be able to enter.
with an action replay or gameshark
You walk in.
I don't know about Diamond/Pearl... But for Emerald: go to Battle Frontier. Go to Battle Tower. Put a Pokemon in the PC. Save. Then take it back out. Go to Free Battle. Enter the Pokemon you want to clone and another Pokemon. It will ask you to save. Say no, then reset. You have that Pokemon in your party and in the PC. Pokemaster95
You cannot get the codebreaker on Pokemon emerald you have to buy it its a thing you can plug into your GBA (GameBoy Advance) and enter in a code and there you go.