No, you cannot since Pokemon White has newer Pokemon
No, but you can transfer/trade Pokemon from Diamond to White.
Yes you can but you can't trade from black to pearl or white to diamond because the games are not compatible with each other because the Pokemon in black and white will come up as ? in the pokedex's of the other games. But you just can't trade to pearl from black or white sorry. However you can trade between black and white using infrared connection. (the other games don't have infrared that's why the game cancels the trade between pearl and black or diamond to black).
I'm not that sure if you can trade, but you can transfer.
you can send Pokemon from diamond to white, but not vice versa. its kinda like with diamond and ruby/sapphire/emerald. hope this helps :D
I am pretty sure.
You cannot trade between the new games of Pokémon Black and Pokémon White and the previous games of Pokémon Diamond and Pokémon Pearl and there is no way for you to trade Pokémon from "Pokémon Black or Pokémon White" over to Pokémon Diamond or Pokémon Pearl. But you can transfer any Pokemon from the old ds games TO black or white .
yep i traded my penisaur for a gulpin
No.
Not the way you think. Pokemon Diamond and Pokemon White can not directly trade with each other. Once you have defeated the main storyline, you gain access to new areas. Between Nimbasu city and White forest there is a small building. This is where you can transfer Pokemon form Diamond to White/Black. You need a second DS to do this.
Yes.
You have to trade it from platinum, diamond or pearl
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.