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When Randy and Howard don't want to admit they are too scared to ride Norrisville's newest waterslide, the Ninja sabotages it and inadvertently releases one of Viceroy's earliest creations.

On the hottest day of the year, Mort Weinerman is finally able to build Randy and Howard's dream pool, thanks to his new promotion he received for building a Ninja that destroys robots for McFist.

Catfish Booray returns to Norrisville as a substitute teacher under control of the Sorcerer.

Randy and Howard put investigative reporter Debbie Kang on the trail of the Ninja's secret identity.

Randy brings the Sorcerer's ball to Julian's magic-themed birthday party and accidentally unleashed its power.

Howard finds some other friends to hang with, causing a jealous Randy to plot a way to drive a wedge between Howard and his new bros.

Randy and Howard are psyched to rock out with pop star Levandar Hart, but they are unaware that Levandar is secretly plotting his revenge for kicked out of their band.

Randy and Howard rescue their favorite animatronic rock star from Whoopee World, only to discover he isn't who he seems to be.

Randy and Howard must take care of a bologna baby for science class, and it mysteriously comes to live.

When Bucky creates a ninja theme song that the Ninja can't stand, Ninja's attempts to shut it down only makes it more popular.

Insulted that Howard doesn't think he's a good liar, Randy goes to extreme lengths to prove to his friend wrong and puts both of them in grave danger.

Worried about losing the "Best Bud" food-tasting competition, Randy uses the Nomicon to cheat and give himself super-senses.

When Randy finds and falls in love with Viceroy's beloved pet Otto, he refuses to give it back and puts Norrisville in danger.

Randy goes undercover to infiltrate Bash's inner circle so he can discover the secret behind McFist's next Ninja-destroying plan.

Randy can't resist tormenting Howard on Halloween by telling the scary story of the terrifying Mudfart and inadvertently brings the maniacal Mudfart back to life.

Randy unleashed the terrifying orange Halloweenja suit from the Nomicon and soon discover that it's a force he can't control.

Wonk laser tag players Randy and Howard decide to use Ninja-ing to level the playing field.

Stuck in a dream-within-a-dream-within-a-dream, Randy must figure out how to escape the loop.

Howard finds out about the true meaning of Hanukkah by saving Greg's Game Hole.

Randy and Howard go to Snow-klahoma. However, Randy leaves the Nomicon at school on purpose to prevent his ninja duties from distracting them.

Randy’s fake sick day creates more trouble than he bargained for after Howard attempts to get his best friend back to school to avoid eating lunch by himself.

Even though he knows he shouldn’t, Randy breaks into McFist’s empty house to retrieve a lost boomerang, putting himself and Howard in grave danger.

Ninja becomes blinded by his own doodles and seeks the help of S. Ward Smith, the blind sword smith of Norrisville.

Ninja learns the dangers of selling out when he endorses every business in Norrisville, including McFist Industries.

When Randy brags about his Ninja skills, Howard sets out to prove that he is a true mastermind that could beat the Ninja.

When Randy and Howard’s fake “Chuck-a-Cabra” video gives them instant celebrity, it draws the attention of monster hunter Brawn Brickwall who tries to horn in on their glory by noogie-ing the beast.

Debbie discovers that Randy is the ninja and reveals it to the world.

Randy learns of a guardian of one the the Sorcerer's orbs and visits him, learning that it's Plop-Plop, the original Ninja's best friend.

Viceroy, while sick, steals ideas from Rorg: Hero of the Past cartoon marathon for robots to destroy the ninja with so he can go home to rest.

Mort Weinerman becomes paranoid of the Ninja being out to get him and his family. Hoping to protect his family he attacks first.

The principal starts Saturday classes to make up the class time lost due to Ninja incidents. Howard suddenly gets smarter and smarter, and eventually takes out his rage on the school.

Randy breaks up his friendship with Howard, and starts hanging out with a female Ninja fan named Rachel.

8 years ago, Howard and Randy meet up and sneak out of daycare to see the Ninja in action.

Howard has been selling off the Ninja's weapons he leaves behind after a fight. Unfortunately, Viceroy buys them and builds a Ninjabot to destroy the Ninja.

Randy and Howard become the new mascots for Norrisville High soccer, only to learn just Howard can be the mascot.

McFist and the Ninja get trapped and lost in Scrap City, a dump for all the faulty machines made by McFist.

For Howard's birthday, Randy takes him out for a ride on a space shuttle.

Principal Slimovitz is fired thanks to Randy and a computerized principal is brought in for his replacement, leading to everyone in the school being brainwashed.

Randy and Howard have to read a huge poem to pass an English test and not be split up for the rest of high school.

Randy and Howard pretend to defeat one of McFist's machines to get into a party and become popular.

After finding a beak in thier food, Randy and Howard demand free food and a meeting with Mr. McFlubbuster, only to end up in a war between fast food joints.

The school puts a ban on cake fries, and Randy leads the students into a protest. Randy knows the Ninja shouldn't be involve, but finds the folk hero Le Beret attacking the school for the protest.

While enjoying Spring Break, Randy sends McFist flying off the reosrt island, which causes him to raid the island as pirates.

Howard rips a loud one next to the Ninja, leading to the Ninja being too distracted in fights and getting captured.

Howard buys an idol of infinite wishes during a field trip to Little Norrisville, losing himself to the power it gives him.

The power ball leaks into the water supply, during everyone but Randy and Howard into zombies that evil Julian controls to find the power balls.

Randy discovers his family is moving, so he goes to defeat Evil Julian once and for all before they leave.

After falling into the Land of Shadows, Randy and Howard must find their way back to Norrisville to stop Evil Julian.