Best Friends Forever.Everything begins with Klaus looking up Preyas's data saying how he doesn't possess a bakugan like him and how he would like to add it to his seemingly extensive Bakugan collection. It then switches to the brawlers as they return to Marucho's plane as another day of searching for the infinity core and a door to Vestroia ends in failure. Marucho and Preyas cheer everyone up by making takoyaki to eat. Dan later suggests that they ask for information about the infinity core on their website while everyone disagrees, Shun agrees with Dan saying that even if they keep their search a secret info on it can still be leaked so they should go on the offensive and stick their necks out to see what happens. With all the brawlers and bakugan in agreement Marucho uploads Dan's video on the website which Klaus receives. In the morning the brawlers receive a message stating that if they want info on the infinity core then go to Germany. Once there they meet Klaus who reveals that he lied to them to get them to come here where he will take Preyas and that he works for Masquerade. Marucho and Preyas take on Klaus and his Sirenoid. The battle doesn't go so well and in the end Preyas is sent to the Doom Dimension!