Tamago's best friend, and also his long-time rival. Gunma is the most famous B-ders from Kanzai, who is commonly known as "Sniper Gunma" or "Sniper from the West", from his unique accuracy and rapid fire skills. Gunma is a very strategic and intelligent person. His plan always work as effectively as he planned, and he may even think of some craziest ever tactics to overcome the enemies. He's the main man of Team Guts, and supposedly, the leader of the team.
Although, unlike Tamago, Gunma is more mature and reasoning. He look at both side of the world, to observe the good and bad of the situation. However, after being friend with Tamago, Gunma's mind sometimes becomes out-of-reason, resulting himself trying out many mission-impossible tactics when Tamago is around. Gunma believes that Tamago's spirit and power are beyond normal, and he admitted that when Tamago is around, anything can be possible.

In the history of Super B-daman series, Gunma supposedly has a total of 6 main b-daman (excluding his collections of other B-daman for researching and developing new tactics). All of his B-damans support his rapid fire skills and his accuracy in B-da Battles.
Magnet Bomber (Owned at the beginning of the story, past about this B-daman is unknown)
Wild Wyvern (The second upgraded OS B-daman, created after the creation of Fighting Phoenix)
Valiant Wyvern (Rapid-Fire PI B-daman, created after the creation of Battle Phoenix)
Spread Wyvern (Rapid-Fire PI-EX B-daman, created after the creation of Combat Phoenix)
Flash Wyvern (Rapid-Fire RE B-daman, created after the creation of Guardian Phoenix)

Although, Gunma is very short-tempered, and rarely can be as clumsy as Tamago is. Gunma also hates to be humiliated by some B-ders, for being in an infamous unknown team like Team Guts, and for being weak without power. Gunma's only weak point is that he's scared of ghosts.

(Source: Wikipedia)

Tamago Tosaka is a fifth-grader who loves nothing more than a B-Daman battle. One day, Ganma Nishibe, a talented bead-warrior, is transferred to Tamago's school. Their B-Daman battles set the stage for this story. Beginning as rivals, the two come together to prepare for the B-Daman championships. The two boys come to trust and help one another as they work toward their shared goal.<br><br>
(Source: d-rights)

Gunma Nishibe