Here Comes The Fire Dragon

Dan Kuso and Kazuki Daimon's life changes one day when strange cards fall out of the sky and they grab one, which Dan and his friend Shun use to invent a game they call "Bakugan." With other friends, they formed a group called the "Bakugan Battle Brawlers". And joined by new comers of Bakugan, Kazuki and his friends. As they are then accidentally dragged into fighting for the fate of Vestroia (the home dimension of the Bakugans). Vestroia loses its natural balance and merges with the Earth and many other worlds. A rogue Bakugan called "Naga" has been tempted to capture the power of the Infinity and Silent Cores, Which together formed the Perfect Core that balanced Vestroia, But Naga has absorbed too much negative energy and thus has been trapped within the Silent Core, destabilizing Vestroia. Naga now seeks the mighty Infinity Core so that he can complete the all-powerful Perfect Core and have almighty power and absolute control over the Earth and Vestroia. As Kazuki and his friends team up with their Bakugan and fight against Naga's Bakugan Thieves as the six legendary BakuFighters.

(A.N. In this new story series I am only including the first and second seasons of Bakugan. No Gundalian Invaders on forward because those are my least favorite series. No offense. And no Battle Planet onwards either. Still enjoy)