Well, when people train pokemon to increase certain stats that the pokemon is naturally good at. Like leveling an Alakazam to increase it's Sp.Atk a lot. Look on psypokes.com to get a tutorial on EV training.
Oh yeah. You might need to message me when you want to fight on Friday cos I might forget. Also, expect Wailord to be replaced with a Metagross as I might have got it to Lv. 100 by then!