Momakase blackmails Hiro into helping her steal her family's knives from Yama's safe.

To try to prove Yama is behind a mysterious crime spree, perpetrated by tiny bots, Hiro is drawn back into the illegal world of bot-fighting.

Big Hero 6 face their greatest challenge as Obake unleashes his plan on San Fransokyo.

Megan confronts Hiro about being a vigilante and threatens to tell Chief Cruz the truth.

Big Hero 6 must stop a secret underground racing league.

Big Hero 6 attempts to thwart a bank robbery and encounter Supersonic Sue, an old school roller skating villain.

Upon discovering Baymax’s ability to detect if a person is lying, Hiro attempts to use him to uncover proof of deceit.

Hiro invents a tiny robot, Mini-Max, to supervise and be a sidekick to Fred while the rest of the team is in class.

Professor Granville becomes increasingly pushy with Big Hero 6 as she helps them figure out a mysterious series of food-related burglaries.

Hiro and Fred enlist Karmi to find out what happened to Orso Knox, the man who was mysteriously turned into a monster.

Honey Lemon sets out to make Globby human again.

When Hiro and Go Go accompany Krei to the woods to deal with Nedd Ludd, they run into The Hibagon, a legendary monster.

Hiro becomes demoralized when his latest school project fails spectacularly; the team must take on the incompetent villain, Globby.

Wasabi's need for order clashes with Hiro's chaotic work style when they collaborate on a school project.

Honey Lemon takes art classes at a rival school.

After the gang goes to a spooky haunted house, Hiro keeps seeing Tadashi around the city and ultimately finds himself face to face with his brother.

When Aunt Cass sets Hiro up on a date, he begins to wonder if he’s missing out on being a regular kid.

Big Hero 6 must continue to fight off a city overrun with monsters.

When Aunt Cass stumbles into an underground cooking competition, she thrives and becomes addicted to the excitement.

Karmi posts Big Hero 6 fan fiction, embarrassing Hiro.

Hiro’s jealousy of Karmi’s internship at Sycorax leads him to intern at Krei Tech.

Mayoi, mysterious yet adorable creatures, begin to appear in San Fransokyo.

Karmi and Hiro team up to help treat someone with genetically engineered parasites.

Fred's invisibility function on his suit glitches during patrol.

Chief Cruz and the police get the upper hand in their battle with both villains and Big Hero 6 when they begin using Buddy Guardians, powerful new robots produced by Krei Tech.