If you don't know anyone that has Pokemon pearl or diamond how do you find someone in the union room?

the way that you can find someone in the union room without any of your friends is to: 1.buy a USB cable for your ds 2.plug in the USB cable and download any software needed 3.go to Jubilife to the GTS(Global Trade System) 4.position yourself on the globe inside the GTS 5.lastly, go to any pokecenter upstairs to the union room there you go, enjoy, anonymous