Ep 21. The Bot-Fighter

Hiro and the rest of the team at Big Hero 6 discover that a new bot-fighter has arrived in San Fransokyo and is causing havoc in the city. The bot-fighter is using highly advanced technology and is able to defeat all the bots in the arena. Hiro and the team decide to investigate the bot-fighter and find out who he is and what his motivations are.

Meanwhile, Aunt Cass starts a new business venture, which involves selling a new type of food at her café. However, her business starts suffering because of the bot-fighter's actions, as people stop coming to the café due to the chaos caused by the bot-fighter. Hiro and the team realize that they need to stop the bot-fighter before more damage is done to the city and to Aunt Cass' business.

The team starts investigating the bot-fighter and discovers that he is actually a teenage boy named Karmi, who is trying to seek revenge against the bot-fighting industry. Karmi's father was a bot-fighter who died in the arena, and Karmi believes that the industry is corrupt and dangerous. He creates his own advanced bot, which he uses to defeat other bots in the arena and prove his point.

Hiro and the team meet with Karmi and try to reason with him, but Karmi refuses to back down. He believes that the only way to take down the bot-fighting industry is through force and demonstrates his bot's capabilities by taking on Baymax in a fight. However, Hiro manages to convince Karmi that there are other ways to bring change to the industry, and promises to help him find a more peaceful solution.

Together, Hiro and Karmi come up with a plan to expose the corruption in the bot-fighting industry and bring attention to the dangers of the sport. They create a video that goes viral and catches the attention of the public and the authorities. The video shows the true faces of the bot-fighting industry, including the illegal modifications made to the bots, the dangerous fights and the injuries suffered by the bot-fighters.

As a result of the video, the authorities crack down on the illegal activities in the bot-fighting industry and Karmi's message is heard by the public. Aunt Cass' café starts getting more customers again, as the chaos caused by the bot-fighter subsides. Hiro and the team are happy that they were able to bring about change and that they made a new friend in Karmi.

In conclusion, 'The Bot-Fighter' is an action-packed episode that explores the theme of corruption within the entertainment industry. The episode raises important questions about the ethics of bot-fighting and how it affects the people involved in it. It showcases the power of friendship and the importance of finding peaceful solutions to complex problems.