I was just looking on Brachium and Grafias and seen that there were PHILIP head screws where the rod connects to the head of the 2! PHILIPS HEADS!!!!! Y SM!
I took apart my Darkus Spin Ravenoid once and the screw in the center spin mechanism was a philips head. I think they've been hiding the occasional philips head in Bakugan for a while, it's just becoming more evident now.