TV-Series
Description
Helios began as a powerful Pyrus Bakugan serving Spectra Phantom, driven by a desire to become the ultimate Bakugan. Frequently clashing with Drago as his primary rival, he initially operated under the alias Viper Helios. During this time, he captured Bakugan like Blade Tigrerra for Prince Hydron. His intense confrontations with Drago involved multiple battles where victories traded hands, often influenced by external enhancements such as illegal battle cards or mechanical upgrades like Metal Fencer. Following a significant defeat by Drago, he transformed into Cyber Helios. This form granted cybernetic enhancements and increased power derived from Drago's data, enabling victories over opponents like Mira Fermin's Wilda and further battles against Drago, evolving into Maxus Helios during their conflicts.

Accepting Drago's superiority shifted Helios's allegiance to the Resistance, evolving his role from antagonist to ally. He participated in critical missions against threats like King Zenoheld's Alternative Weapon System. During Mechtanium Surge, he underwent a permanent evolution into Infinity Helios. This marked a significant attribute change from Pyrus to Darkus and introduced organic elements like a natural left eye and hand to his previously mechanical form, alongside metallic spikes enhancing combat. As Infinity Helios, he gained new tools including the BakuNano Bombaplode, the Mechtogan Slynix, and the Battle Suit Doomtronic. He demonstrated exceptional combat prowess, defeating large numbers of Chaos Bakugan and repelling invasions within Bakugan Interspace.

Infinity Helios possessed advanced abilities: FARBAS Infinity for self-repair and defense augmentation, Destroy Quasar for area attacks, and Mauser Impact for high-damage assaults. He uniquely engaged in BakuMutation, combining powers with Titanium Dragonoid and Taylean to form Mutant Helios, enhancing their collective strength against foes like Razen Titans and cloned Mechtogan. During the Interspace Armageddon, he collaborated directly with Drago, merging abilities to halt Mag Mel's incursion. His willingness to remain behind to cover allies' retreat underscored his commitment. He later participated in the final confrontation against Evolved Razenoid, inflicting damage despite being overpowered. Following the defeat of major threats, he continued supporting Drago and the Bakugan brawlers in protecting Earth, maintaining his partnership with Spectra.

In the physical Bakugan game, Infinity Helios featured multiple G-Power values across different attributes, with the Aquos variant reaching 1200 Gs, one of the highest non-evolved Bakugan at the time. His capabilities included tactical versatility through numerous BakuNano compatibility points.