Kirby and Dawn's mom accepts a job as a substitute teacher at their school. Dawn makes her mother promise to pretend not to know who she is, while Kirby never leaves her side.
Kirby tries to get an embarrassing video of him losing a rap-battle to his mom taken down from the Internet, so he gets a member of the AV Club to help. Meanwhile, Dawn becomes obsessed with bubble wrap.
Kirby and Fish enter a contest to see who can keep their hands on a video game the longest. Meanwhile, Mr. Buckets tries to cash in his Chore Day coupon from five years ago.
Kirby, Eli and Fish work on a project for the science fair to create the ultimate high five, but Kirby suffers an injury that hampers his creativity and forces him to act out like his characters.
Kirby's underground comic book that mocks Forest Hills' teachers is accidentally put in the school's suggestion box, so Kirby, Fish and Eli try to steal it back before it's found.
Kirby becomes the leader of his class after his teacher leaves, and he creates a fun, chaotic atmosphere. Meanwhile, Dawn and Belinda go on a hygiene strike after the principal bans hair dryers.
Someone is defacing school property with cartoon murals and signing them with Kirby's name, getting him in trouble at school. Kirby and Dawn team up to solve the case.
Kirby and his friends hope to attend a fright-night film festival, but their plans are threatened when they get quarantined at school. Meanwhile, Dawn and Belinda get invited to a Halloween party at the house of a popular kid at school.
Kirby learns about a character design contest featuring the ultimate prize - a chance to meet idol Mac McCallister and debut an animated character on TV.