Dan and Athena travel to Auropolis after learning of the weak connection between Earth and Vestroia; Dan and Athena discover that the Swarm are absorbing Earth's energy; Magnus leads the Awesome Brawlers to help defend the planet.

The Awesome Brawlers battle against Hanoj; as the Awesome Brawlers train for the Battle Judgement, they learn of a new core, the Nova Core, and Dan and Drago use its mysterious new powers against an unexpected opponent.

The Awesome Brawlers split up and attempt to master the new Nova technique; Lia protects a couple of kids against a local bully; Athena faces an old foe at the Bakugan Academy.

Dan continues to struggle with his mastery of the Nova technique; Dan, Lia and Wynton fend off a gang of outlaws in an old-time Western theme park.

In the first Battle Judgement match, Ajit must revisit his past while the others help protect island residents from a Swarm invasion; Lia and Wynton have a topsy-turvy brawl in Ventana's River of Time in the second Battle Judgement match.

Lord Brakken's scheming uncle has seized the throne in Brakistan, where Ajit and Shun face their foes in the third Battle Judgment match.