Bakugan: New Vestroia is the second season to the Japanese animated tv series Bakugan Battle Brawlers. It involves a new battle system, including Bakugan Traps. Bakugan: New Vestroia revolves around Dan, Marucho, and Shun being called to the newly restored Vestroia, allying with three new brawlers named Mira, Ace, and Baron. The newly-formed group of friends must battle the evil Vestals to free the captured Bakugan, destroy Vestal’s evil plans for domination and free New Vestroia.
With the battle against the Alternative pressing on, Hydron shows up to lend a hand. Meanwhile, Prof. Clay receives a video transmisson from a faraway world just as Mira and Keith arrive to make one final appeal. Once the brawlers realize Mira and Keith are missing, they deduce that the siblings may have found a way inside, so Dan uses Jetkor to blast a hole in the Alternative while Gus and Marucho stay behind to guard the rear.
With Keith having gone to the palace and having no way to find said palace, the Resistance are stuck. Luckily Alice and Dr. Michael arrive and use the teleportation signature left behind by Shadow and Mylene to back track to the palace. Meanwhile, Zenoheld continues his attack, forcing Spectra and Gus to retreat and come up with a plan of counter attack.
Hydron discovers that a fellow prisoner is none other than Gus Grav, who was presumed dead in episode 39. Meanwhile, Runo, Julie and Mira prepare a cake for Keith to officially celebrate his joining the Resistance. However, Keith’s mind lingers elsewhere, something that Mira notices but Keith brushes off. Dan suggests that instead of waiting for Zenoheld’s attack, they storm the palace.
With Bakugan Interspace beginning to collapse on itself, Mira and Keith attempt to save Mylene and Shadow, despite her wishes to die rather than face dishonorment. Before she can change her mind, she and Shadow fall into the Death Ball’s portal while Mira and Keith are extracted from Bakugan Interspace safely. Meanwhile, King Zenoheld learns of Mylene and Shadow’s fall and blames their lose, as well as the Resistance obtaining the Alternative data, on his son Prince Hydron who he has tortured as a result.
King Zenoheld sends Mylene and Shadow Prove to collect the Brawlers’ Battle Gear and Bakugan DNA Data so with the data the Alternative could be finished faster. Having followed Billy to Marucho’s house in episode 37, Mylene and Shadow have prior knowledge to their hiding place. Once they arrive, they are ambushed by the Resistance, but Mylene takes Mira hostage!