Yes. It doesn't make a difference where the Pokémon comes from whether it's from Diamond, Pearl, via migration, via the Global Terminal (or Global Trade Station) or via Friend Code Wi-Fi.
There is no Battle Frontier in Pokemon Diamond and Pearl. Only the Battle Tower.
No, Pokemon Sapphire Version does not have a Battle Frontier. However, Pokemon Emerald and Pokemon Platinum do have the Battle Frontier.
no you can not get exp in the battle frontier in Pokemon plat
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.
No, there is no battle frontier my brother (Pokemon master) says so. their is however one in platinum.
If you see a Pokemon in the battle frontier you have not yet seen, it will not record it. The only way you can add that Pokemon to your pokedex is if you see it outside of battle frontier.
It's in the battle frontier at the battle area
No, you cannot.
NO you just have to get all the sinnoh Pokemon if its diamond or pearl but in platinum there is more...............
beat the frontier brains
No, the Battle Frontier can only be found in Emerald, Platinum and HeartGold/SoulSilver.
Finishing the Battle Frontier in Platinum means obtaining all Silver and Gold prints handed out by defeating the Frontier Brains.