How can I trade in Pokemon Diamond?

I'm using No$gba Emulator to play pokemon Diamond but I am wondering if I could trade pokemons with this emulator. If anyone knows how to trade with any emulator then please would you tell me?How can I trade in Pokemon Diamond?yes first go to the pokemon center in jublife city than go to the second floor and go in the union room if some one els is in there talk to him/her and there would be things you can put trade and then you can make sure its in jublife city good luck my friend code is 154724143047 peeeeeeeeealse pick me as best answer. good bye see i am generis to you. and the answer i gave you is write garented. once more good luckHow can I trade in Pokemon Diamond?Are we still talking about Pokemon? I thought that died at the turn of the millenium