A Royale Pain.Shun has been battling far more frequently since taking the position of leader of the Brawlers, and it is starting to take its toll on him. However, he is more determined than ever to put a stop to the chaotic battling when Mechtogans are allowed in battles and Shun decides to enter the Battle Royale to stop them. Things get tough when he goes up against Robin from Team Anubias and Soon from Team Sellon, who each uses Bolcanon and Krowl, each equipped with their BakuNanos, Hyper Pulsor and Slicerix. Shun and Taylean fight them but start losing. Shun and Taylean fight on. However, Taylean spawns a Mechtogan called Silent Strike, making things even more complicated. Shun tries his best to defeat it to no avail, and Silent Strike defeats both Bolcanon and Krowl. Shun is then rescued by Rafe and Paige with their Bakugan, Boulderon and Wolfurio. After Silent Strike flees, Rafe and Paige reveal that they are a Neathian and Gundalian, respectively. They tell Shun and Marucho that the Mechtogan are the offspring of chaos when there is a lack of sync between a brawler and their Bakugan. They also say that Princess Fabia has sent them to learn from the Brawlers. Shun however, refuses their help and leaves while Marucho's father asks him to quit the Brawlers, surprising Marucho.