With wonder trade, its either a hit or miss. You either get a really, really cool pokemon, or a really, really uncool pokemon. The honest majority is bad pokemon though. You put in a Palkia, your hopes is to get out a Dialga, or something like that. But its more like you put in a Palkia, you get out a Fletchinder, Bidoof, or some horrible trade. There is a chance, though, that you'll get a cool pokemon. However, thats normally by the time you decided to WT away your useless pokemon, continueing the cycle. Overexplaining ftw!