Alto Brontes is the third evolution of Brontes.
Alto Brontes changed from Mega Brontes. He has become mean spirited and gains more energy from defeated Bakugan. He has an extra set of arms to battle multiple Bakugan at once. His strength has grown ten times stronger, but has made him slower. A bright white circle on his chest can freeze a charging Bakugan with a single blast. It is said in episode 31 that Gus Grav took his soul. Chaos Ability X forced Brontes to evolve. His Bakugan form is similar to Mega Brontes but with two extra arms.
Bakugan: New Vestroia
Alto Brontes appears in episode 31, Gus used the Chaos Ability X on Mega Brontes then it was forced to evolve. Mega Brontes evolved into Alto Brontes due to this force evolution.
In episode 33, Volt Luster and Gus Grav brawl beacuse Volt wants Brontes back. During Battle Gus says, "He screamed out your name, Volt," to fill Volt with anger. Volt loses to Gus, but Brontes is thrown away once again by Gus. He ends up somewhere in some sort of desert like region in New Vestroia. Afterwords, he cries, "Volt, save me!", in the same place Dan and Baron entered New Vestroia after Mira left. He and Volt never reunited.
- Ability Cards
- Wizard Proxy: Transfers 300 Gs from the opponent to one of your Bakugan.
- Atmosphere: Transfers 400 Gs from the opponent to Alto Brontes.
- Black Gates: Nullifies opponent's Gate Card.
- Shining Nightmare: Adds 400 Gs to Alto Brontes.
- Sprite Glow: Subtracts 300 Gs from the opponent.
- Magic Dice: Rolls a die; its effect depends on the number.
- Rolling a 4: Subtracts 200 Gs from the opponent.
- Rolling a 6: Reflects the opponent's ability.
- Rolling a 1: Adds 200 Gs to Alto Brontes.
- Trance Rapture Illusion: Subtracts 300 Gs from the opponent.
- Brontes is the only Bakugan that Spectra and Gus evolved that lost his own will.
- Currently, Alto Brontes is the only Bakugan that evolved from Chaos Ability X who has been released as a toy.
- He is the only Bakugan who evolved due to Chaos Ability X who was thrown out twice.