Brontes' Betrayal is the 33rd episode of Bakugan: New Vestroia. It aired on December 26, 2009. In Japan it aired on October 16, 2010.
After Alice lost to Shadow Prove, she teleports to Marucho's house to communicate with the Resistance at Klaus's house in Vestal. Alice warns them of the Vexos attack on her and that Runo and Julie could be next. Dan decides to head back to Earth even though it is likely to be a trap. However, since Dr. Micheal's transporter was destroyed, they at first believe it is impossible for them to return to Earth. Luckily, Klaus has one of his own. As the Resistance head to Baron's house so he can say goodbye to his family, Spectra appears in Klaus' Mansion only to find the Resistance gone and leaves Klaus with a warning, that they can't hide forever. When Spectra returns to Vestal Destroyer, he finds Gus has answered Volt's challenge for Brontes. A battle quickly ensue between the two and Volt tries his best to not attack Brontes directly causing him to struggle against Gus. When Volt begins to predict Brontes' moves and gains the upper hand, Gus offers Volt a place beside Spectra, but he refuses. Unfortunately, Volt is no match for his former partner and loses and passes out. Once Gus returns to Spectra's ship, he says that Brontes has served his purpose and tosses him out like trash. Brontes lands on the ground, opens and cries out for Volt to save him.
- Alice informs the Resistance of Shadow's attack on Earth.
- Klaus is revealed to have a dimension transporter of his own, which the Resistance uses to return to Earth.
- Volt challenges Gus to a battle to win Brontes back.
- Volt is revealed to have obtained a new Mechanical Bakugan called Boriates.
- Gus defeats Volt, thus keeping Brontes.
- Brontes becomes self-aware again.
- Gus throws Brontes out, leaving him stuck in New Vestroia.
Bakugan Trap Seen
- In the Japanese Version, the beginning scene when Volt punches the wall in anger is longer and the actual flashback is from Final Countdown when Mylene throws Elico and Brontes. The flashback from Spectra Rises is shown as a recap.