Danball Senki

In 2050, children battle with palm-sized robots called LBX inside arenas made from reinforced cardboard tough enough to contain their weapons. Ban Yamano adores the hobby but has never owned an LBX of his own until a mysterious woman entrusts him with the AX-00 and warns that it carries both the hope and despair of humanity.

The robot pulls Ban and his friends into a conspiracy far beyond a children's game. Corporations, secret organizations, and powerful opponents begin hunting the technology in his hands, and every LBX battle brings Ban closer to the truth behind his missing father and a plan capable of changing the world.