Roll your Bakugan over the included BakuCores to POP OPEN Baku-Action, or choose your Bakugan Ultra for an even more dynamic LEAP OPEN transformation! You can even add onto your starter set and collect all of Season 2 Bakugan! Build your collection, trade with friends and BATTLE! Roll into action with the Bakugan Battle Brawlers Starter 3-Pack! BAKUGAN BRAWL!