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. 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. 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. 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 Zenoheld's Mechanical Bakugan, Farbros. 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. 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. However, the remaining energies are taken and the Brawlers rush to New Vestroia to evacuate all the Bakugan. Drago, however, refuses to give up, manages to destroy the BT System by absorbing all 6 Attribute Energies and evolves again into Helix Dragonoid. 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. Keith reveals that Zenoheld is working on a powerful weapon called the Alternative System and helps construct Battle Gear for Drago. Meanwhile, the Vexos begin crumbling from within as both Volt, Lync and Shadow decide to leave, feeling that Zenoheld and his son Hydron have finally gone too far but are quickly disposed of by Prince Hydron. In the final battle, the Brawlers with Gus, who joins as their newest member, manage to destroy the Alternative and the Resistance go their separate ways.