Prince Hydron

プリンス・ハイドロン

Hydron (Haidoron) was the Prince of Vestal, the leader of New Vestroia, and the commander of the Vexos. He subsequently became the new lead Subterra brawler for the Vexos, replacing Gus after Gus and Spectra departed the group. In the episode "Facing Ace," it is revealed that he possessed the petrified statues of five of the Six Soldiers who saved Vestroia: Runo's Tigrerra, Julie's Gorem, Marucho's Preyas, Shun's Skyress, and Alice's Hydranoid. His goal was to "complete his collection" by obtaining Dan's Drago.
In "An Heir to Spare," Zenoheld became angry with him for failing to retrieve the Phantom Data and punished Hydron with The Agonizer. Later, Hydron dreamed of Lync and Volt telling him that he, not Zenoheld, should be the new King. He then challenged Zenoheld to a brawl and lost. However, he was able to defeat Farbros and halve Zenoheld's Life Gauge. He was then thrown into a prison cell along with Gus, thus proving that Gus was still alive.
He managed to escape when Gus tricked him into starting a brawl inside the cells by calling him a lapdog. This angered Hydron, causing him to release Dryoid and Rex Vulcan. Upon their release, they broke the cells, allowing both Gus and Hydron to escape.
He then fought alongside the brawlers to defeat his father once and for all, but it appeared he may have died in the process (when the Alternative exploded). Just before the explosion, Hydron looked up and said: "Volt...Lync...I'll be there...soon." This must mean that the "dimension" to which he sent Volt and Lync is the Vestal form of the afterlife.
It is unknown whether he survived with Dryoid and returned to find Volt and Lync, but it is more likely that the quote referred to the fact that he was about to die and join Volt and Lync in death.