I might follow the tradition and take my first favorite starter (Pocchama) in my first favorite game (Diamond), then take my second favorite starter (Hikozaru) in the third version of the game (whatever it's called) and then my least favorite starter (Naetoru) in the remaining game of the generation (Pearl).
Or, I might change the tradition, since unlike back in the old days, I now have money to buy both Diamond and Pearl at the same time. Dunno yet.
At any rate, I will get all three in my Diamond, which will be my "Main Game" of the generation. I haven't yet figured out how in the heck am I going to do that this time, though, because GBA, GBA SP and a Link Cable won't help me now >-<'' Maybe trough that new game for Wii? Or maybe I'll buy a second DS 8D! *Kicks self*