Dan and Drago are saved from Pyrus/Darkus hybrid Bakugans Centorrior and Druman by Noble Lion: a Pyrus Tigrerra who is the oldest and wisest of all Bakugan.

Next Stop Naga-Ville: Dan and Drago enter the hybrid world of Pyrus and Darkus where the dark army is running rampant.

Dan and Drago win and leave to the next world. The sisters say the only way out is if they beat them in a race.

The Race to Vestroia: As the remaining Brawlers enter the hybrid world of Subterra and Haos, a pair of Subterra/Haos Bakugan sisters named Rabeeder and Tricloid fall in love with Dan.

The rest of the Bakugan team disappear through the portal into another dimension of Vestroia. As they fight, they suddenly see the portal to the next hybrid world of Vestroia is closing and so they agree that Shun and Marucho are to stay in the Ventus and Aquos world to defeat the two Bakugan. They enter the Ventus and Aquos world where they meet Tayghen and Hairadee: two Bakugan of both Ventus and Aquos elements.

A Fish Called Taygen: The Bakugan Battle Brawlers enter Vestroia and realize Vestroia has become a hybrid world where two elements are mixed together to make one element together.

However, Klaus was just trying to teach her a lesson, that everyone, and everything must work together in order to create harmony.

Alice Gets Schooled: Alice tells Klaus about what she did as Masquerade, and gets pulled into a battle to punish her for sending his Bakugan to the Doom Dimension while she had been Masquerade.

In responding to this threat, Dan and his friends set out to find Naga and retrieve the Silent Core from his vile henchmen. In this last installment of the first season of Bakugan Battle Brawlers, evil has spread through the universe at an alarming rate as Naga and his band of Bakugan wreak havoc on the human world.

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