Danma Kuusou

While brawling, the leader of the Battle Brawlers Dan unleashes the power of Pyrus Dragonoid and is sucked into an alternate dimension causing a break in the balance of both worlds and possibly the end to all humanity.

Dan is a boy who really loves Bakugan, but gets frustrated easily. His greatest ambition is to be the number one brawler in the world, which is what he attends at the last episode of Bakugan Battle Brawlers. He tends to act rash and impulsive which often leads him to trouble. He is very eager for a brawl, thinking he can take on anyone, which causes him to complain a lot when he has to wait around in hiding, as shown in the first and second season. By the third season Dan has outgrown that habit as he was telling Jake to help rebuild the second shield generator after they had a successful victory over the Gundalians.

Dan used to play using raw power without any kind of strategy, often caring more about winning and not the consequences to come. This attitude is what caused him and Drago to get into a fight which ended with Dan throwing Drago in the river. After losing a battle to Ryo and reuniting with Drago, Dan learned that there's more to Bakugan than just power. Because of this Dan was able to come up with a strategy to defeat Ryo in a rematch. After that experience, Dan started using a little more strategy in his battles. Through one of his strategies he was able to defeat Chan Lee, the third ranked Bakugan player.

In episode 1, When Dan first appears he is seen riding his bike to the park, where he is supposed to battle Shuji. He managed to defeat him with ease. Later he is then challenged to a rematch, which he accepts. Dan's surprise at seeing Shuji wield a Darkus Bakugan put him at a slight disadvantage. However, this didn't stop him from fighting back. During the near end of the battle Dan has a vision of Drago fighting with Fear Ripper and Drago tries to make him stop fighting with him. After the vision was over, Drago and Fear Ripper appeared in the field and Drago was able to defeat him, giving Dan the victory. Dan was surprised hearing Drago talking to Fear Ripper and he decides that he was imagining that he was talking.

In Bakugan Battle Brawlers: New Vestroia, Dan, now 15 years old, is reunited with Drago, after he was separated from the Perfect Core with the help of the Legendary Soldiers of Vestroia. Drago took him and unknown to their knowledge, Marucho, to New Vestroia, where they met up with Mira, Ace, and Baron. While Mira and Baron were accepting of him, Ace wanted him to prove himself in a brawl, which ended in a draw. He has agreed to help the Resistance free the Bakugan by destroying all the Dimension Controllers that are keeping the Bakugan in their ball forms.