TV-Series
Description
Battsu, also known as the Demon Lord Dragon, is a forbidden monster originally from Dragon World. His past is marked by immense destruction, having devastated the continent of Dragon World, which led to his imprisonment within an ancient shrine. This seal remained in place for a long period until it was accidentally broken by the young fighter Gao Mikado during a visit to Dragon World.

In terms of personality, Battsu initially exhibits a tyrannical and uncontrollable nature. He disregards authority and displays strong destructive tendencies, making him resistant to forming bonds or partnerships with others. Despite his violent history and reluctance to cooperate, Gao persists in seeking a friendship with him. Over time, this persistence pays off, and Battsu evolves from a creature of mutual distrust to a loyal and deeply connected partner. A key moment solidifying this change is the "Starry Sky Promise," which signifies his growing emotional connection and loyalty to Gao. This partnership leads to Battsu becoming Gao’s primary Buddy Monster, replacing previous companions like Drum Bunker Dragon and Bal Dragon.

Throughout the narrative, Battsu plays a crucial role as Gao's partner in battle. A major test of their relationship occurs during a conflict when the two experience a temporary separation, an event highlighted by the episode "Buddy Breakup! Farewell, Batzz!" This separation puts their bond to the ultimate test but ultimately reinforces their commitment to one another. Battsu’s past remains a mystery for a time, as he does not initially remember why he almost destroyed Dragon World. However, hints are revealed when he encounters the villain Wisdom and the monster Geargod VII, whose gaze Battsu finds strangely familiar, suggesting a connection to his forgotten past.

In the "All-Star Fight" arc, Battsu participates alongside Gao in the Gao Genuine Gameface Tournament, also known as the GGG Cup. Here, his presence proves integral to Gao's strategies as they compete against other renowned fighters and monsters, including a notable showdown against Tasuku Ryuenji. The tournament showcases Battsu's full integration into Gao's life and the broader Buddyfighting community.

Battsu possesses several notable abilities. His combat style is aggressive and overwhelming, leveraging immense dragon strength and dark energy attacks that align with his heritage as a Demon Lord. A significant development in his capabilities is achieving the "Overturn" ability. During a confrontation with the forces of Wisdom, Battsu uses this power to evolve into the Overturn Black Death Dragon, representing a critical advancement in his fighting prowess.