Ep 21. My Good Friend

In Bakugan Battle Brawlers season 1 episode 21, titled "My Good Friend," the brawlers find themselves infiltrating a Masquerade party in order to retrieve a secret file from a high-security vault. As they navigate the event, they encounter a new opponent named Chan Lee, who challenges Marucho to a battle. Marucho quickly realizes that Chan Lee is not simply an opponent, but a childhood friend who he thought was no longer playing Bakugan.

Meanwhile, Shun and Runo focus on stealing the file, but are accosted by Klaus and Lync, two members of the Vexos organization. The Vexos are seeking the same file, and a battle ensues. With their backs against the wall, Shun and Runo must use their Bakugan to fend off their powerful opponents and protect the mission's objective.

As Marucho and Chan Lee battle it out with their Bakugan, memories of their past friendship come flooding back. The two were once inseparable, but drifted apart when Chan Lee became more interested in achieving success and power through Bakugan battles. However, as the battle progresses, Chan Lee realizes the error of his ways and the two friends are finally able to reconnect.

Back in the vault, Shun and Runo find themselves overpowered by Klaus and Lync, who unleash some of the strongest Bakugan they have ever seen. However, the brawlers are able to come together and work as a team to defeat their opponents and retrieve the file.

As the episode comes to a close, the brawlers return to their headquarters to analyze the contents of the file. They discover that it contains information about the Vexos' plans to acquire a new piece of technology, and realize that they must work even harder to stay ahead of their opponents.

In "My Good Friend," the brawlers face some of their toughest challenges yet, both in battle and in their personal relationships. Through their struggles, they learn the importance of friendship, teamwork, and determination. Will they be able to stay ahead of the Vexos and protect the world from their dangerous plans? Viewers will have to tune in to find out.