First of all, you MUST have Wi-Fi. Next, you have to beat the Elite Four (all 5 of them) and go through the credits after the game autosaves (there's also a way to skip the credits, but be SURE to do it after the autosave - press and hold L, R, Start, and Select until the screen turns white). Then exit your house and Fly to Snowpoint City. The guy standing by the boat should let you on. He will take you to the new Battle Zone! Go to the big tower place, only to find that you and your Rival must team up again. But this time it's against Volkner and Flint! After defeating them you will gain access to the new (but not very improved) BATTLE FRONTIER!!! Only the Battle Tower has Wi-Fi battles, so just talk to the lady in blue clothing. Hope I helped!
No.
GO to the spear pillar. go to youtube and write How to go to the Spear Pillar in Pokemon Platinum.
go to codejunkies.com and look up Pokemon platinum if its not there then go to supercheats.com search for Pokemon platinum and click on the ar codes button
Just go to Pokemon platinum central and click on pokedex and it shows you where to battle all the Pokemon in sinnoh.
Apart from the Battle Frontier, no.
yes you see them but it does not go on your pokedex sorry
He heads to the Great Marsh, as there was a bomb there
you can use the vs seeker and battle to get more experience points or you can go to Pokemon center and battle the reporters
you go to the path to the Pokemon league and there's a double battle a boy and a girl you go to the and they have a ocilery
In Diamond and Pearl, it's called the Battle zone. In platinum, the battle frontier. First beat the Pokemon league. Then, back at home, (you will find out about a boat in snowpoint) go to snowpoint, and ride the ship.
you have to beat cynthia.than,go to the fight area.(top right of map)
He goes to the Battle Tower. And if your lucky,he might do a double battle with you.