you get an action replay dumdum!!!
go to this page http://www.serebii.net/diamondpearl/legendaries.shtml this page has all the legendaries you can normally catch in in Pokemon diamond/pearl all other legendaries you have to transfer from a 3rd generation game
No. Pokemon Black and White are the only current games with no legendaries not belonging to their region. It can be traded from other games, though.
In diamond is TENTACOOL but I am not sure about in other Pokemon games. In diamond is TENTACOOL but I am not sure about in other Pokemon games.
you cant
you would have to get firered/leafgreen, heartgold/soulsilver, ruby/sapphire/emerald, and diamond/pearl/platinum. Then get all the legendaries or other pokemon you wanted and transfer them to your white version. Or you could just hack with an action replay.
Yes, with Diamond/Pearl and Platinum.
it transfers pokemon from other games, such as diamond/pearl
You can't find Palkia in Pokemon Diamond, but you can in Pokemon Platinum. After you catch Giratina, go back to Spear Pillar, and one of the two legendaries should appear. After you catch the first one, go back again to get the other one.
to transport Pokemon from other Pokemon games to your Pokemon diamond you need to have six Pokemon in your PC on the other Pokemon catridge
You're going to have to trade over from the different versions, but you cannot have Black and White Pokemon in the other games.
It is unlike the music from the other Pokemon games.
You can only move pokemon from ruby to diamond, not the other way around, through pal park. You need both games in your ds to do this