One day, mysterious cards fell from the sky. They could summon powerful creatures from another dimension, and soon became the basis for a new game called Bakugan. The game quickly grew popular among children and teenagers, with top players competing in a worldwide ranking.
At the same time, a war for control of Vestroia—the home dimension of Bakugan cards—rages on. The realm is thrown into chaos when the White Dragon Naga and his servants, the Doom Beings, invade. Dimensions begin to merge, and many Bakugan players slowly realize that their hobby is much more than a simple game.
Danma Kuusou, a dedicated Bakugan player, aims to become the number one in the World Ranking. But during one of his battles, he receives a vision of a clash in Vestroia. The fight then shifts to Earth, where Danma obtains a talking, powerful fire Bakugan: Pyrus Dragonoid.
Soon he is pulled into the conflict, and together with his team, the Bakugan Brawlers, must journey across dimensions to restore balance to a devastated world.