Actually, they went higher. Mine was store bogt, and I live in the U.S. Series 2 (which was still B1) went higher than 450g, and made the new highest G-power at 650g.
Oh did not know that.I stopped collecting for a while, and only started again when the new bakugan (the bigger brawlers and series 2) came out
They went up higher. The very first series' strongest Bakugan was 450G but the second series brought it up some more. I know my strongest from back then is 500G Pyrus Juggernoid. But I believe the strongest of the B1's is a Sub-Terra Terrorclaw 650G. Theres probably otehrs too.