Although he is obviously ill, Hiro refuses to listen to his team-mates and Baymax and only watch from afar as they fight the mercenary team Mad Jacks.
Hiro invents a tiny robot, Mini-Max, to supervise and be a sidekick to Fred while the rest of the team is in class.
A purse thief gets more than he bargained for when he steals Honey Lemon's chem-lab purse and it turns him into a monster.
Crazy game show host Mr. Sparkles threatens to hurt Hiro's cat Mochi to force Go Go to join a game. But she is very afraid of public appearances.
Hiro becomes demoralized when his latest school project fails spectacularly; the team must take on the incompetent villain, Globby.
When Aunt Cass stumbles into an underground cooking competition, she thrives, and becomes addicted to the excitement.