i was going to do the same thing.... my friend makes metal and plastic miniatures. Only thing is you would have to take apart the real bakugan to use all of the springs and pins for the metal bakugan. And with the added weight i doubt the springs would work properly AND unless it was something like aluminum, the magnet wouldnt work properly either.
Yeah, I was getting different springs and everything to make it so they don't break. And im either using aluminum or pewter. And I don't really care about the bakugan, I have plenty of doubles, so that's not an issue. I just REALLY want a metal bakugan. It would be so COOL! And if I get it right, I will probably send it out to be chromed....OoOoOo...shiny! lol