you must have a link cable. use it to connect to other players and you can either trade Pokemon or battle.
No
It is the same as any other games, but you can't trade with other pokemon games. You can only trade your pokemon from the different generation games, you can't give your white version pokemon to the earlier generations.
No you can not trade from GBA games to Pokemon Diamond/Pearl but instead you can migrate.If you mean the original Pokemon Red (as in the second version to ever be released) then no.If you mean Pokemon FireRed, the last answerer was accurate in saying you can't trade, but migrate.
Nope. I dont think so as it is not the original version from DS.
You can't catch a Charmander in Pokemon Silver. You have to trade it from the original games.
You cannot trade Pokemon on from other games (unless it's Pokemon black/white) until you have defeated the elite four.
No, because the Blue version wouldn't recognze it(I think). You can't trade from silver,gold, or crystal to anything but red,yellow,blue because new games have different Pokemon not known to old games.
No. Pokemon can't be traded from Black/White to older games at all, even if those pokemon existed in those older games.
Keldo is unavailable in the games, and can only be obtained through a Nintendo Event or trade. Reshiram is only available in Pokemon White 2 or the original Pokemon Black. To obtain Reshiram, you would have to trade with someone who already has it.
You'll need to trade for it from Pokemon Silver, or the older GBC games.
If you can trade Pokemon from crystal version to gold version my guess is yes
You'll need to trade for it from the older Pokemon GBC games.