TV-Series
Description
Gregorius Reed emerges as a central antagonist in Bakugan: Geogan Rising. This adult male possesses brown eyes and brown hair reaching his ears. A talented businessman and world-famous Bakugan collector, his former guardian Bakugan partners include Aurelus Spartillion and Viloch. He stands as the second Aurelus brawler in the series, following Ajit.

In Geogan Rising, Gregorius Reed seized mobile gate technology, journeyed to Vestroia, and stole the Healing Core Cell, bringing it to Earth. He harnessed the Healing Core Cell's power to call forth legendary warriors known as Geogan. During Vestroia's Battle Judgment to decide separation from Earth, he fought alongside henchmen and his Bakugan partner, Viloch. In battle, he merged six Geogan of different factions—Pyrus, Aurelus, Darkus, Aquos, Haos, and Ventus—into Viloch, creating Ultimate Viloch. When offering aid to Nillious in the final battle, he transferred all Geo-Cores to Viloch, who then betrayed him. Following Viloch's defeat by Dan Kouzo and Drago, Gregorius Reed returned to Earth and confessed to leading the thieves responsible for the core cell theft.

After Viloch's betrayal, Gregorius Reed lost everything and ceased viewing himself as a criminal. This loss ignited a deep hatred for all Bakugan. In Bakugan: Evolutions, he allied with Wagner and the Gate Crushers, sponsoring their group with the goal of eradicating Bakugan from Earth. When Dan, Wynton, Lightning, Benton, and AAAnimus forces intervened, he and Wagner attempted to block Baku Cores but were defeated. Wagner and Gregorius Reed tried to escape but were apprehended by Kravitz and AAAnimus operatives.

Later, in Bakugan: Legends, Gregorius Reed joined Hanoj's team for another Battle Judgment. He received a time-displaced Nova version of Viloch to enact his revenge. Utilizing Nova Viloch's ability to negate most attacks, he effortlessly defeated Shun and Lightning. However, Dan and Drago ultimately overcame him using Nao-Gear technology.

Throughout his appearances, Gregorius Reed transitions from a collector and antagonist driven by power to a figure motivated solely by vengeance against Bakugan following his downfall and betrayal.