Things quiet down until Spectra resurfaces again to battle Dan and when he loses, he concedes that Dan is number one and joins the Brawlers, returning to his original self, Keith Clay. Drago, however, refuses to give up and manages to destroy the BT System by absorbing all 6 Attribute Energies and evolves again into Helix Dragonoid. However, the remaining energies are taken and the Brawlers rush to New Vestroia to evacuate all the Bakugan. After losing half the energies, the Brawlers decided to attack instead, engaging a temporary alliance with Spectra Phantom, the former leader of the Vexos, along with his sidekick Gus Grav.
In desperation, the Ancient Warriors give the Resistance Bakugan their attribute energies to protect them from Zenoheld, who has the Bakugan Termination System, a machine built to wipe out all Bakugan but needs the Attribute Energies to power it, these energies result in the 6 Bakugan evolving. The Resistance part but reunite six months later when they discover that King Zenoheld of Vestal has attacked the Six Ancient Warriors in an attempt to steal the Attribute Energies, the Six Ancient Warriors engage in a 6-on-1 battle with Zenoheld, but are unable to defeat Zenohelds Mechanical Bakugan, Farbros. While battling against the evil Vexos, the top Vestal brawlers, who follow the rules of their Prince, the Brawlers destroy each of the three Dimension Controllers that keep the Bakugan in their ball form, liberating New Vestroia. Three Vestals: Mira, Ace and Baron, however, encounter Shun, who was an old friend of Dan and Marucho, so he knew the truth about Bakugan and formed the Bakugan Brawlers Resistance. Season 2: New Vestroia The two of the six Battle Brawlers (Dan and Marucho) return to New Vestroia and discover that it has been colonized by an alien race called Vestals, who are unaware that the Bakugan are intelligent beings. So Dan and the brawlers decided to bring back balance by meeting new friends and allies in the other worlds, learn more about the origin of the Bakugan and facing Naga, a rogue bakugan who seeks the mighty Infinity Core so that he could complete the all-powerful Perfect Core and have and absolute control over Earth and Vestroia. An evil Bakugan called Naga was tempted to take the power of the Infinity and Silent Cores, which formed the Perfect Core that balanced Vestroia, but absorbed too much negative energy and thus was trapped within the Silent Core and destabilised Vestroia. The season is the story of a dimension called Vestroia which loses its natural balance and merges with the Earth and many other worlds.