Episode 18 Evolution Revolution: After losing his best friend to Klaus, Marucho pleads to Klaus for the return of his beloved Preyas. In a desperate attempt to get Preyas back, Marucho and Runo run through a portal, chasing after Klaus and entering inside Masquerade's evil lair. Inside Masquerade's castle, they learn about Bakugan evolution, the miracle of power increase. The brawlers soon find out that the Bakugan who holds the Infinity Core will be the ultimate Bakugan. Just when they think it's strange enough, Julio Santana, master of the Haos attribute and 4th ranked Bakugan Player in the world challenges them. Dan surprisingly joins in the battle alongside with Runo. Can Dan and Runo defeat Julio's trump combination with his Tentaclear or will their Bakugan bow down before Masquerade's evil powers?
Episode 19 Julie Plays Hard Brawl: Marucho is still mourning over the lost of his Preyas as the Brawlers go their separate ways after an unexpected quarrel. Julie is still trying her best to get her childhood friend, Billy back to his senses. Dan and Julie soon return to Germany after discovering the location of Billy. In a rematch between Billy and Julie, their friendship is tested to its limits as Masquerade joins in, promising to increase Billy's rank in the standings if he defeats Julie. Will Julie be able to help Billy overcome Masquerade's control or will Billy recklessly defeat Julie once again?
Episode 20 A Little Help from my Friends: A fight breaks up Shun from the group of Battle Brawlers. As Alice chases after Shun to remind him of his friends, Dan is only thinking about himself, taking down Masquerade. Shun and Alice soon meet up with Komba once again for a brawl . So Shun battles him. In this rematch with Komba, Shun must learn to depend on his friends or end up as bratty as Komba. Can Shun overcome this obstacle or will he lose to Komba's Harpus?
Episode 21 My Good Friend: Under the orders of Masquerade, Klaus, Chan-Lee, and Julio have returned to finish off the Brawlers. This time, Dan, Runo, and Marucho must take them on. However, during their battle, Preyas makes an unexpected appearance... in Klaus' hands! Can Marucho overcome the betrayal of Preyas? Will he try to get Preyas back? Or will he lose to Klaus again! As well, after their previous fight, the Brawlers are still selfishly brawling for their own motives. Can they work together? Or will they be beat one-by-one?