And as the players search the world for the Infinity Core they battle world ranked Bakugan along the way This season kicks off with the mysterious Masquerade and Naga casting spells to turn the Bakugan Brawlers against Dan. The puzzling part is that each brawler is eventually returned to BI. With the Neathian moles making themselves known, they begin kidnapping brawlers from Bakugan Interspace.