I have pokemon diamond dont no how 2 trade can sum1 show me ill give u either vespiquen dialga or girtina.?

i need to know how to trade and if anyonetells me ill give them 1 MAYBE 2 of the following chatot lv 82,dielga lv 60,infernape lv 63,girtina lv 70,dewgong lv 47,cacturne lv 52,dugtrio lv 54,cresselia lv 51,leafeon lv 22,seel lv 41,gardevior lv 37,beldum lv 53,gallade lv 21,glaceon lv 19,haunter lv 40,sharpedo lv 45,or a mesprit lv 50 please i need 2 know and if u have 2 hook it up 2 the comp. ull have 2 tellme that.