Big Hero 6 must stop a secret underground racing league.

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

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

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

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

When Hiro finds a wrapped present in the closet, he assumes it's from Aunt Cass and takes it in order to figure out what it is. However, after a mix-up, the present becomes lost and Hiro enlists the Big Hero 6 team to track it down.

When Big Hero 6 find Mr. Sparkles working at the Pizza Party-torium, he tells them he's decided to leave the world of crime behind.

Noodle Burger Boy and the mascots abduct Fred.