Aurelus (オーレラス, Ōrerasu?) is one of the six elemental Factions that Bakugan can belong to. It is a mysterious, elusive Faction characterized by raw, golden energy. The region on Vestroia where Aurelus Bakugan reside is known as Aureopolis.
The primary color is a brown-ish yellow designed to resemble gold. The secondary color for larger highlights is a silvery gray, and the tertiary color used for smaller highlights is a dark gray. In the anime, Golden Bakugan's color scheme ranges between light and dark shades of yellow and golden-yellow. 
In Bakugan: Armored Alliance, several new Aurelus Bakugan are introduced: Pharol and Auxillataur with their Brawler, Ajit, who is the first Aurelus Brawler in the reboot series; and additional members of the Supreme Council: Etris, Zellus, and Garillion.
In Bakugan: Geogan Rising, five new Aurelus Bakugan have been introduced: Pincitaur, who is the new main Bakugan of Ajit; Viloch, who is a member of the Supreme Council; Spartillion, former enforcer of the Supreme Council and current main Bakugan of Gregorius Reed who is the new second Aurelus Brawler; three Auratoa, guardians of the Supreme Council; and an Aurelus King Cubbo, who is the leader of a Cubbo Village on Vestroia.
|Ajit||Pharol (Former Main) |
Pincitaur (Current Main)
Geogan Titan King
|Agents of the Supreme Council|
Aurelus Bakugan are generally more powerful than other Factions in terms of B-Power and Damage. However, they very rarely have support in the game, with the only Aurelus-attributed cards in the first two expansions being Evo Cards. The third expansion, Age of Aurelus, focuses on exploring Aurelus Bakugan and features the first Aurelus Cards (Action, Flip and Hero), with Evos, Baku-Gear (Armored Alliance) and Geogan (Geogan Rising) cards being the usual Ability cards in every card set.
In Shields of Vestroia they introduce a new Aurelus Action Card called Pyro Storm.
Aurelus Bakugan come with Aurelus Character Cards but come with a Faction Card based on the the Bakugan's Faction from the anime (If it's native to Aurelus, the card may differ). For example, Hydorous is Aquos in the anime, so a solo Bakugan Ultra pack of Aurelus Hydorous Ultra comes with Counter Aquos, a card of the Aquos Faction. The only exceptions are Aurelus Bakugan released during the Age of Aurelus and Armored Elite sets, alongside the Aurelus Gillator Ultra Gear Solo and the Aurelus Trox Gear Deka.
- This is the first new Attribute (now called Faction) to be introduced into the Bakugan game since the pre-HSP release of Bakugan Battle Brawlers, which introduced Ventus.
- In the anime, Aurelus is not referred to by name. Aurelus Bakugan are instead called "Golden Bakugan".
The name Aurelus comes from "aurum", the Latin word for gold, in reference to the gold primary color of an Aurelus Bakugan.