Playing pokemon on a DS for the first time. I was just curious as to how wi-fi trading works. lets say I caught a gastly. eventually I will need to do trade mumbo jumbo in order to get it to be a gengar. in the GBA and before games I just ignored trade evolution pokemon because no friends. but how easy is it to trade on wi-fi? do I still need to find someone to be my friend for 5 minutes to trade with? or is it simpler than that?