Randy and Howard become judges for their school's talent show and Randy tells Howard that he should be "the mean judge." But the Sorcerer takes this chance and makes all the failing acts monsters.

Howard accidentally tells everyone on a web show that he knows who the ninja is and he is captured by McFist, who demands that he tell him who the ninja is.

Randy and Howard wonder why everyone in town is turning into zombies.

Randy must find a way to juggle his life as a ninja and his friendship with Howard during the battle of the bands, while McFist tries to use a truth device that will reveal the ninja's identity during the show.

After a power outage at school, a Stankified Monster frozen in ice is freed. When Randy de-stanks him, he and Howard learn that his name is Dickie and his monster form was frozen in ice by the Ninja of 1985. When Dickie (voiced by Bobcat Goldthwait) is saddened by this and how he missed his chance with Tawny (voiced by Annie Potts), The Sorcerer takes the opportunity to re-stank him and find out what is the object of his stank.

During the premiere a new 6D film, the movie's title character comes to life and threatens to destroy Norrisville.

Bash is thought to be the ninja.

Randy and Howard seek revenge on a French exchange student who stole their Internet video fame - only to cause him to stank out and create a scene they weren't expecting.

When a robot disguised as a rival school's chess team member crushes Norrisville High's record - and their spirit, a mass stanking breaks out.

The Ninja accidentally summons a giant monster when he uses an ancient ninja lesson during a rap battle.

Randy must go with Howard to CluckFest under the threat of Bash Johnson. This won't be easy for Randy since he is afraid of chickens. Meanwhile, Hannibal McFist and Willem Viceroy III unleash a fear-pooping robotic rhinoceros called the Rhinosaurus that forces everyone to confront their worst fear as part of their plot to find the Ninja's greatest fear and take advantage of it.

Mac Antfee (voiced by David Koechner) returns to Norrisville as a motivational speaker, only to have Randy reignite his burning desire to destroy the Ninja and take his place.

Randy, Howard, and all the boys at Norrisville High are entranced by the new girl in school named Amanda Levay. Little do they know that she's the Sorceress (voiced by Jennifer Tilly), the Sorcerer's long lost love in disguise where she has plans to free the Sorcerer.

During "Ninja Day" McFist schemes to steal the spotlight by introducing a new hero - Himself.