yes
yes its also the same for platinum diamond and pearl, but diamond and pearl do not have a battle frontier
no but you can battle him in heart gold/soul silver
Nope. But you can in soul silver or heart gold. (At the top of mount silver)
platinum, soul silver, heart gold, diamond and pearl
yes it can so can heart gold and soul silver
Diamond, Pearl, Platinum, Heart Gold, and Soul Silver.
Diamond,Pearl,Platinum,Soul Silver & Heart Gold
It is imposible. You can migrate it from LeafGreen, FireRed, Emerald, Ruby, or Sapphire. Trade it from Diamond or Pearl (if you migrated it or got it off of trade station) to Platinum. My advice is to wait until Pokemon Heart Gold and Soul Silver come out in 2010. It is a remake for the DS and DSi of Silver and Gold. It will have connection to Platinum, Diamond, and Pearl. Possibly Battle Revolution.
You can use a Cyndaquil as a starter Pokemon in heart gold, soul silver, gold, silver, crystal and diamond pearl platinum.
You have to trade from Pokemon Soul Silver, Heart Gold, Platinum, Diamond, or Pearl.
To get both leafeon and glaceon in Pokemon soul silver or heart gold you have to trade it from diamond pearl or platinum.
You can't catch Murkrow in Pokemon Platinum. You'll have to trade with either Diamond or Heart Gold/Soul Silver.