Final Countdown is the 25th episode of Bakugan: New Vestroia. It aired on October 24, 2009.
As the battle between Maxus Dragonoid and Maxus Helios rages on, Mylene interrupts Hydron in his collection room, by dragging him off. She explains that they are leaving New Vestroia. Hydron refuses at first, being afraid to face his father, due to his failure to successfully occupy New Vestroia, but agrees to Mylene's plan to label Spectra as a traitor. Meanwhile, Mira, Marucho and Shun try to activate a machine to reverse the process of Preyas, Gorem, Tigrerra, Hydranoid, and Skyress's petrification, but are unable to determine the numeric code. Dan and Drago take to the skies to battle Spectra and Helios but the power coming from their battle is far too much and they crash into the palace. Mylene prepares for their departure from New Vestroia, but not before tossing out Elico and Brontes, believing that Bakugan with feelings are useless and imperfect fighting machines since Professor Clay has already created many powerful Mechanical Bakugan. Out of a stroke of luck, Elfin discovers the activation code, but with the palace self-destruction under way, it may be too late.
- Dan continues his battle with Spectra.
- Hydron reveals his presence to Mira, Marucho, and Shun.
- Mylene forces Hydron to come with the Vexos as they flee New Vestroia.
- Afraid to face Zenoheld's wrath, Hydron and Mylene decide to label Spectra a traitor and create a coverup for Lync's alliance with him.
- Mira, Shun, and Marucho begin searching for the security combination to un-bronze the original Brawlers' Bakugan.
- Elfin finds the combination by accident.
- Mylene discards Brontes and Elico, believing the Vexos have no use for organic Bakugan.
- Hydron sets the palace to self-destruct.
- Hydron, Professor Clay, and the remaining Vexos board an escape craft.
- Neo Dragonoid
- Cyborg Helios
- Maxus Dragonoid
- Maxus Helios
- Thunder Wilda
- Mega Brontes
- Hammer Gorem
- Blade Tigrerra
- Storm Skyress
- Alpha Hydranoid
- Several other unknown Mechanical Bakugan in canisters
- This was the first time Hammer Gorem, Blade Tigrerra, Storm Skyress, Preyas, and Alpha Hydranoid have appeared (nonpetrified) since the last episode of Bakugan Battle Brawlers, except for Tigrerra who appeared briefly in episode 1 of Bakugan: New Vestroia.