A unique Digimon whose entire body is made up of unique plastic blocks. It is said that a child playing on the Internet created it by imitating Agumon's appearance, so it is very cute. Unlike the confident Agumon, it has a cowardly side and its blocks fall apart into pieces when it is surprised. However, it possesses a righteous heart that doesn't condone evil. Also, since it absolutely loves children, it enjoys communicating with them over the Net.
One of the "Legend-Arms", who are capable of transforming themselves into weapons. A legend about the Legend-Arms goes, "if held by an angel it will save the world, and if held by a demon it will destroy the world." Zubamon carries the "Twentiest" data, and often shouts out "I am the Twentiest!" despite not understanding what it means. It despises crookedness, and is constantly seeking sharpness. A day where its battles, jokes, and sharpness turn out well will leave it in high spirits.