Yamato, who was raised by cats until he was five, has only dreamt of owning a B-Daman and playing the sport. When his dream comes true and is given the legendary B-Daman, Cobalt Blade, will Yamato have what it takes to control it from those who wish to steal it from him?

In a rematch against Gray, Yamato learns how to better control Cobalt Blade. During the match, Bull's ""dark side"" makes his first appearance in order to steal both Cobalt Blade and Chrome Zephyr. It is up to Gray and Yamato to keep that from happening. Can Gray and Yamato put their differences aside to stop him?

Eager to B-DaBattle other B-DaPlayers, Yamato learns of the B-Coliseum, a place where all B-DaPlayers can play all sorts of B-Daman games. When he gets there he soon realizes that he still has a lot to learn about the sport. But when a mysterious member of the Shadow Alliance shows up, it's up to Yamato to put his skills to the test and stop the evil Battle Crow from destroying the B-Coliseum.

Ababa sends Wen and Li to take control of Cobalt Blade after Battle Crow's failed attempt. Yamato, Gray, and Bull run into Wen and Li on Delta Rock where they must B-DaBattle them in order to save Chrome Zephyr from a pillar of ice. If Yamato and Bull can't defeat Wen and Li, Gray will lose Chrome Zephyr forever. But things get a lot more difficult when both Wen and Li combine their B-Damans to form Bakurekuso.

Wen and Li win the match thanks to Li's cheating, and Yamato discovers Gray is a member of the Shadow Alliance. Yamato was in shock when he heard this, and he was very angry.

Yamato goes onward to find Armada, but, on the way, Yamato meets Terry, who follows Yamato to find Armada, but, the two keep getting in fights. When they made it to Armada, they were given a test. The test was to draw circles & triangles all over the place, even underwater! A swarm of paper bats put their abilities to the test as well as learning Rapid-Shooting, but, what will Armada's next challenge be?

Armada's next test is to knock down the statue of Armada with 100,000 B-DaBalls! At first it seemed impossible, but, later, when the dam was breaking, Terry & Yamato use the Rapid-Shooting technique to knock down the statue & save the town!

Yamato, Terry, and Armada went to the B-Daman tournament and find Yamato's mom there, and Mie makes them sell lunch boxes. Then, this big weirdo bumps into Yamato (they dropped the lunch boxes, but they caught it), and leaves a few moments later. Only the best 16 players can go to the semi-finals, the first challenge was ""Shoot the Gap,"" Li, Wen, Gray, Terry, and an unknown player named X received a perfect 100 score. However, Yamato, before shooting a B-DaBall, bumped the table and accidentally knocked down 90 pins (there were 100 in total and 10 managed to stand). The results were in and Yamato had a tie with the same weirdo who bumped into him a while ago named Castio. With his B-Daman, Iron Meter, they were having a battle named ""Ultimate Strike"" with heavy pins. Castio scored 99 points(he knocked down 99 pins, one was standing), Yamato, however, went on fire and his B-DaFire knocked all the pins down (as well as burning a line on the table), and Yamato gets to go to the semi-final

Yamato runs into Bull at the Winner's tournament allowing the two friends to be reunited, but Terry doubts Bull's blading skills forcing a B-Dabattle. who will win this battle, and what is the Shadow Alliance doing with their eyes on Bull?

Bull has been taken over by Ababa. Can Yamato find some way to restore his friend to his original self while he must battle him in the First Round of the Winner's Tournament?

Yamato must help some new friends gain back their B-Dabucks after a monkey of the Shadow Alliance sells them faulty parts.

Enjyu finally takes to the stage in the Winner's Tuornament first round. Just how powerful of a B-Daplayer is he, and can anyone beat him when he has Cobalt Blade's brother?

Li goes on an undercover mission to steal Cobalt Blade, but Mie's friendliness destroy's all his tricks. Can Li actually be trusted?

In an intense battle - Terry takes on Li. Terry's B-Daman is broken and it's up to Yamato to fix it before the time runs out.

The gang runs out of money and can't buy food or get to the second round of the Winner's Tournament. Luckily, a new 5 station tuornament has begun. They enter, but can Yamato win the first match-up?

After taking a 1-0 lead in the 5 station challenge, Bull gets his turn in a power battle. It looks like he wil fail due to hunger until a Ms. Karat brings him food for saving her, but what will be the results?

Terry seems to be unappreciated when he tries to cook, but can he find a way to be a good soup maker while preparing for the next round of the Battle Tournament?

Down 2-1, Bull must battle between his 3 selves over what to do with Ms. Karat's affection, but will he be able to even it up, or will Bull and the gang be eliminated?

Ms. Karat's father, Watt, is looking for a worthy husband for Karat. He believes Bull's alternate personality could be the one, so he kidnaps him, but what will this mean for Yamato when he's left alone with a chance to win the tournament?

Karat helps Bull escape, and then Terry saves the two of them, but will they be able to get back to the Battle 5 tournament and root Yamato to a victory when Yamato is even 1-1 and in a first hit wins competition for match 3?

Yamato learns the truth about Grey's sister, and is about to throw the B-Dabattle until Grey knocks some sense into him. The two resume the battle, but who will advance to the final 4?

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Terry gets his chance of advancing the the final 4 semifinals, but he must defeat Grey's sister Leina to do so. Who will advance, and can Grey find a way to save his sister?

Yamato and company break into the Shadow Alliance's base hoping to save Leina, but instead it leads to a Leina/ Grey showdown. Who will prevail?

With Yamato and Leina advancing, Caine and some of the others from the Battle 5 tournament return to offer their congratulations, but do they really want to congratulate them, or do they have something else sinister planned? Can Yamato battle some sense into them?

The gang decides to help Yamato build a new blade with a new upgraded system, but the Battle 5 members may have something to say about it. What exactly is Cobalt Saber, and what type of power does it have? Watch and find out.

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Yamato learns how to channel more power to Cobalt Saber's power blast.

Terry tells the gang the legend of Lake B-Daman.