第 18 集: Marucho和Runo潛入Masquerade的巢穴，並與Julio Santana展開Bakugan對決。

18

After losing Preyas to Klaus, Marucho, who is grief-stricken, begs Klaus to return him but Klaus refuses. Klaus opens a portal to Masquerade's evil lair which Marucho and Runo both jump through after Klaus. When there they access Masquerade's computer and learn about the wonders of Bakugan evolution and its intense power. Just when they thought it couldn't get any stranger: Julio Santana! The 4th ranked brawler shows up and challenges them to a battle. Surprisingly, Dan opens his Gate Card at the same time as Runo, Marucho and Julio and is dragged into the battle. Julio insists they both take him and his Haos Tentaclear on. The battle gets intense and once again Drago's power level goes up without Dan's assistance at all. The battle ends with Dan and Runo winning and Runo and Marucho return with Dan to the other brawlers. The brawlers comment on how Masquerade is still on his quest to find the ultimate bakugan. Drago states that if the silent core has fused with the ultimate bakugan Naga then it's possible for the infinity core to do the same, with Julie worrying that that bakugan could be Hydranoid. With that in mind the brawlers are determined to make sure that one of their bakugan becomes the ultimate bakugan before Hydranoid. (Source: Wikipedia)