Hiro and a short-handed Big Hero 6 team attempt to stop Noodle Burger Boy and his new family.

Big Hero 6 responds to Richardson Mole's every whim when he is made mayor for the day.

Hiro enlists the help of the team when Granville's three dogs go missing while under his watch.

Hiro switches Baymax and Mini-Max's chips so that Baymax, using Mini-Max's body, can fit inside a tiny space and offer Mochi medical assistance.

A low-charged Baymax and Mini Max have to join forces with Noodle Boy to save Big Hero 6!.

When Krei wants to sell the Mayor an automated fleet of shuttle vehicles, Honey Lemon suggests giving the shuttles a friendly face and an upbeat personality.

Hardlight crashes Karmi's autograph session for her new chibi series.

Fred is attacked by mechanical cobras, however their target is a former spy codename: Mongoose!.

Fred meets the girls of his dreams, only to be rejected by her!.

4 2 Sing, a famous boy band, decides to be crime fighters and challenge Big Hero 6 to a superhero-off.

Go Go reluctantly goes undercover as the co-host of Wendy Wower's television show.

Globby and Honey Lemon feel guilty about trapping Nega-Globby in the Glop-Vac.

When Basemax opens a spam email, she gets infected with a virus.

In order to recruit child prodigy Rishi Patel, Professor Granville enlists Hiro to give him a tour of SFIT.

When Krei is lost in the old Sycorax building, the heroes must search the abandoned monster factory to find him.

Big Hero 6 is shocked to learn that Mr. Sparkles, going by his real name Frank, has recently been employed at the Pizza Party-torium and has turned over a new leaf. Not wanting to be seen as soft, Honey Lemon tries to out him, but he seems to have changed for the better. A painting is stolen and the team go searching for Mr. Sparkles. However, it is revealed that Yama had kidnapped him as revenge for outing him for his crimes. Honey Lemon doubles down on her attacks and defeats Yama while Mr. Sparkles returns the painting, proving that he has changed. Honey Lemon returns to her quirky bubbly self.

Fred answers an email that says he won a prize. He follows it and it turns out to be a trap by Noodle Burger Boy and his family who create a robot duplicate of Fred and send him out in the hopes of finding Big Hero 6's base and blowing it up. The rest of the team comically fail to recognize that Fred is not Fred as the robots get no closer to their goal. Eventually, El Fuego attacks a bank and the team fight him. When Noodle Burger Boy, in robot Fred's body, is about to be destroyed, the other robots fight El Fuego. Fred manages to escape and joins up to out Noodle Fred. The robots escape as the team come together.

Krei invents a karaoke machine.

Hiro plans to defeat The Mascots once and for all.