Deck Building to Victory!.When Gao learns about the upcoming team tournament known as the Aibo Buddy Cup (ABC), he wants to participate in it with Baku and Kuguru as his teammates. However, Gao and Baku soon argue over the naming of their team and go their separate ways. Later, Kuguru invites Gao to her home where he finds Baku constructing Tetsuya's deck in the hopes of conciliating things between Gao and Baku. Meanwhile, after winning several Buddyfights against his partners Kakumo Maihama and Raita Niitani, Noboru walks back home and is followed by a mysterious old man. Having seen all of Noboru's fights, the old man criticizes his playstyle and suggests to add the El Quixote card to help his deck, but Noboru ignores him. He then sees Tetsuya on the street and decides to challenge him to a Buddyfight as a warmup to the ABC Cup.