Yamato Delgado who acquires the legendary B-Daman known as Cobalt Blade, joins his friends using the sport of B-Daman to fight against the evil Shadow Alliance. This show takes place in the B-DaWorld, where its inhabitants vary.

Upon the creation of marble launching machines known as B-Daman, people started to participate in the competitive sport B-DaBattles. However, B-Daman contain hidden powers which enhance marble shooting that can be misused for combative purposes. One night, a certain object residing behind the walls of a restaurant calls upon Yamato Daiwa-a boy raised by cats. Yamato has been having visions of the object which resembles a machine familiar to everyone. Little does he know, hidden behind the walls is not a mere machine, but the fate of the world.

In another world, the Bedaworld, balls from ancient times are admired and a game called Bedaman, fought with those balls, develops. Daiwa Yamato is a young boy with quite the Be-Spirit. Yamato is chosen user of the Kobalt Blade by the rulers of Beda World, the Beda-Magicians. One after another, Yamato is attacked by members of the evil organization called Shadow. Are the true aims of Shadow to rule the Beda World? Or do they want something else?. Growing up with burning battles and without trustful friendship, what could possibly be lying on Yamatos paths?

Battle B-Daman is a Merchandise-Driven manga/anime about a boy named Yamato Delgado who wants to become the best at a game called B-Daman. Yamato obtains a special B-Daman "blaster" named Cobalt Blade, which an evil organization called the Shadow Alliance plans to steal. The show ran for 1 season in America (2 in Japan, 2004). The original manga by Eiji Inuki ran from 2002 to 2005 in Japan for 8 volumes. The show had two spinoff Gameboy Advance titles, which sold not as well as expected, because they were released after the Nintendo DS made the Gameboy obsolete.

Battle B-Daman or Battle B'Daman is an anime and manga series by Eiji Inuki that first aired in January 2004 in Japan, replacing Beyblade in its timeslot. It premiered in the United States on April 2005. Like its predecessor, it is themed around an enhanced version of a children's schoolyard game - whereas Beyblade was based around spinning tops, Battle B-Daman is a dramatized version of marbles. It is the first show of the B-Daman series to be dubbed in English. In Japan, it airs on TV Tokyo. In the United States, India it once aired on ABC Family and Toon Disney's JETIX block. At one point, as well as G4 in the USA, but on the latter was replaced by G.I. Joe Sigma 6 soon after. In Canada, it airs on YTV, in which on February 2007, the second season commenced with a completely new voice cast, and what some have called inferior dubbing from the first season; the French dub of the show airs on Télétoon.