u will need 2 ds's to connect with diamond. to connect you will need to be able to get to the poke transfer lab. if you can then talk to the man in front of the console then he should either move out the way or take u to the console. then go onto ds download with the ds with diamond in and it should come up with black. also if you want to transfer Pokemon you have to make sure that the Pokemon you want have no hm moves
yes
yes, after you have beaten the elite 4 and go to the transfer building near lacunosa town.
Yup, Pokemon diamond and pearl can connect! Even platinum and Heartgold soulsilver! Its like crazy!
Yes.
you can't get the pokemon off of pokemon black on diamond, but you can do it the other way around.
Migrate from Pokemon Sapphire to Diamond then Diamond to Black/White
no i had to change mine back to a wep
You can migrate pokemon, but I don't think you can actually connect...
No you can't trade with black to diamond but you can trade from diamond to black using the poketransfer lab. (you will have to have beaten the game before you can use the poketransfer lab). Hope I helped this is luke127 signing off.
No.
>You can send 6 pokémon from diamond to black(but not back!). On route 15 of Unova there's a building. Go inside and talk to the man. You can connect to diamond and send six pokémon each time you want (it's not really trading but sending).
Yes, but only after you beat Pokemon White.