Randy Cunningham, a 9th grade kid, becomes a ninja and is to protect Norisville High School when Hannibal McFist and Willem Viceroy III unleash Krakenstein to further the goals of the Sorcerer. But how long can he keep the secret from his best friend Howard Wienerman? Especially since Howard wants them to meet the ninja together.

Ninjanomicon: Believe in the weapon that is in the suit

Randy and Howard try to get into a cool zone in the bleachers when watching their school play basketball. When Bucky is fired, The Sorcerer turns him into a ferocious monster.

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Ninjanomicon: The evil funk possesses the vulnerable using that which he holds most dear

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.

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Ninjanomicon: The Story of the Sorcerer

When Randy discovers that the Norrisville philanthropist Hannibal McFist is his enemy, he has a hard time trying to convince Howard that the one they believed to be their hero is actually an evil villain working with the Sorcerer.

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Ninjanomicon: Beware the enemy who wears a hero's mask

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

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Ninjanomicon: The way to forget is to remember

The Ninja fights a lizard, which copies a sample of his snot. Later Randy and Howard attend a party Bash is throwing, but it's a scheme so McFist can find the ninja by sampling everyone's snot and matching it to the ninja.

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Ninjanomicon: A Ninja must master the art of stealth: Reveal- Conceal; Conceal- Reveal

Randy's class takes a field trip to the town's volcano, but it's probably not going to be a nice stop-by.

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Ninjanomicon: A Ninja must never endanger the innocent, but he must always defend the defenseless

Randy and Howard want to win the Science Fair, but they go too far.

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Ninjanomicon: When faced with a mighty enemy, counter with a mightier force

Howard and Randy take a trip with Julian under their school and go through the scary old gym in an effort to find a mythical golden doctor's note that can help them skip gym, but it is not as easy as they hoped it would be as the Sorcerer plans to take advantage of this.

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Ninjanomicon: The best way to avoid an attack is to avoid an attack

Randy accidentally brings the skeleton of a mad scientist named Jerry Driscoll (voiced by Andy Dick) to life.

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Ninjanomicon: Hidden knowledge of the shadow warrior; The art of healing

Randy and Howard wonder why everyone in town is turning into zombies. Meanwhile, Hannibal McFist and Willem Viceroy discover that their McFizzles product is turning people into zombies.

A Mexican death bear threatens the school.

Guest star: Judy Reyes as Señora Jorge

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Ninjanomicon: The only knowledge the ninja can possess is the knowledge that he possesses no knowledge

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.

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Ninjanomicon: Friendship is a weight the ninja can't carry

After a fight between Randy and Howard, a robo-mantis attacks during the school's annual routine "monster drill" where Howard is pretending to be the ninja. Randy must find a way to get to his mask and to apologize to his friend.

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Ninjanomicon: Respect is a key that opens all doors

Randy travels to the forest to retrieve a sap from a sacred tree in order to restock his ninja gadgets, but McFist beats him there and snags the tree for his holiday party. Randy poses a Ninja Santa to get in to the party and winds up defending himself against a robot snowman and his team of elves.

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Ninjanomicon: Smokebomb is a tool of strategy not a toy for a show and "Only from the sap of the Skunk Pine can a ninja craft a bombs of smoke

Randy must stop a former Norrisville Ninja-turned-nemesis (voiced by David Koechner) from recruiting an army intended to destroy the Ninja.

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Ninjanomicon: The questions of the present can be answered by the past

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.

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Ninjanomicon: The knot not tied unravels

The Wave Slayer relays are occurring in Norrisville as Randy and Howard accidentally wrecks the Wave Slayer where an accident injures Buttermaker and causes Howard to take his place. The Sorcerer takes the opportunity to Stankify Buttermaker (voiced by Sterling Knight) into an aquatic monster that attacks the opposing team.

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Ninjanomicon: When a ninja does wrong, he must own up to his mistakes

Randy must learn a valuable new lesson about respect and humility when after accidentally breaking his sword. He enlists the help of the blind metal shop teacher S. Ward Smith (voiced by John Witherspoon) to get a custom-made sword. Meanwhile, S. Ward Smith's protege Brent believes he was replaced by Howard and the Sorcerer to Stankify Brent (voiced by Jason Earles) into a monster that goes after Howard.

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Ninjanomicon: In the realm of the Ninja, a swordsmith crafts blades in a cauldron of fire

Franz Nukid (voiced by Carlos Alazraqui), a strange new exchange student, threatens to destroy the Ninja as well as Randy and Howard's friendship which Hannibal McFist takes advantage of.

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Ninjanomicon: The most dangerous enemy often wears the mask of an ally

When Randy and Howard's video game battle gets out of hand, the Ninja must save the town from a giant robot.

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Ninjanomicon: A Ninja must know when winning is losing and losing is winning

School Spirit Week turns into a disaster after Howard is possessed by a mythical demon bird called the Tengu which Randy releases.

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Ninjanomicon: —The battle between the tengu and the ninja. —The ninja and the tengu are forever linked, their strengths are shared

When Randy and Howard are forced to share a lunch table with the outcast group "Der Monster Klub", Randy accidentally tells them how to get people stank'd, and they realize these oddballs are playing a dangerous game that could destroy the whole school even when the Sorcerer gets involved when some of the members get depressed.

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

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Ninjanomicon: The Art of Escape: Deceit often comes at a price

Randy helps students escape from Detention Island while fighting the Disciplinarian (voiced by Andy Richter).

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Ninjanomicon: Let the warrior who holds the weapon fight the battle

After Bash unknowingly destakified Pradeep, he is mistaken for the Ninja. The Sorcerer even mistakes Bash for the Ninja and orders Hannibal McFist to have the Robo-Apes capture Bash.

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Ninjanomicon: Once the ninja is known, he can never be unknown

Randy and Howard seek revenge on a French exchange student named Jacques (voiced by Rob Paulsen) who stole their Internet video fame only for the Sorcerer to transform Jacques into a monkey-like monster and create a scene they weren't expecting.

When one of Willem Viceroy's robots disguised as Flackville's chess team member named Steve Riley (the real one was replaced by Hannibal McFist), it crushes Norrisville High's record....and their spirit as part of Hannibal McFist's plot. This causes the Sorcerer to invoke a mass stanking upon the entire school.

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Ninjanomicon: The use of other ninja balls. To underestimate your enemy is to invite your defeat. The apocalypse of the Sorcerer's escape

When Randy loses the NinjaNomicon, he must save it before hundreds of years of Ninja wisdom is revealed to his enemies.

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Ninjanomicon: The tiger who refuses to get his paws wet catches no fish

Randy and Howard are eager to ride a new roller coaster but first, the Ninja must stop a Robo-Ape uprising.

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A feud breaks out when Howard is accepted into a school club and Randy isn't. But when Howard is in danger, the Ninja must put aside his grudge and come to the rescue.

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Ninjanomicon: The Art of Disguise: A master can alter his physical appearance by focusing on his ninja energy, but be warned, lose focus and the energy will master you

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

Guest stars: David Alan Grier as Rudd Rhymez, and Biz Markie as Tiny Timmy Scratch-It

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Ninjanomicon: Stay grounded, do not waver. The earth itself will pay you a favor. To stop your foes and hold them back, harness the soil for an earth attack. —Words can be more powerful than the sword

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.

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Ninjanomicon: To control your fear, you must embrace your fear

Randy and Howard must sacrifice everything to prevent the Ninja's ultimate enemy from running amuck.

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Ninjanomicon: The Sorcerer's Key

When Randy inadvertently mind-wipes himself and develops amnesia, Howard must fill in as the Ninja until Randy can get his memory back.

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Ninjanomicon: The Ultimate Lesson

When Randy inadvertently mind-wipes himself and develops amnesia, Howard must fill in as the Ninja until Randy can get his memory back.

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Ninjanomicon: Previous Ninja Lessons

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 misuses his Ninja powers, and the Nomicon refuses to let him Ninja out and rescue Howard from a psychotic Cajun trapper named Catfish Booray.

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Ninjanomicon: If you abuse the power, you lose the power

When Randy and Howard do not have enough money to buy a McSatchle, they get jobs at McFist-O-Plex and Howard becomes Randy's manager.

Guest star: Billy Idol as Punk-Bots

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Ninjanomicon: The gain is rarely worth the loss

When Randy helps Hannibal McFist's hippie brother Terry (voiced by Steve Zahn) take control of McFist Industries, Whoopee World is turned into a fart-powered nightmare.

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Ninjanomicon: The unknown ally can be more dangerous than the known enemy

In order to score a limousine ride with soccer super star Pitch Kickham (voiced by Simon Pegg), the Ninja swipes a pair of shorts to help him win a shoot-out competition. When McFist sends an I.D. Bot to find the shorts, Randy's identity is compromised and Howard must take Randy's place in the competition.

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Ninjanomicon: A ninja's hand is to give, not to take

The McFreak Show arrives in town and Randy is convinced that he wants a McFreak as a pet. But when the McFreaks go on a rampage, he realizes that wild animals don't really make the best pets.

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Ninjanomicon: What is wild, should not be caged

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.

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Ninjanomicon: The eyes can be deceived but the nose always knows

Bash Johnson pranks the whole school on his annual "Pranks Day". Randy and Howard have enough of it, so Randy decides to prank Bash back. However, Randy's prank backfires and Bash ends up bringing in a deadly weapon made by Willem Viceroy to get even.

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Ninjanomicon: He who crosses the line must prepare for the fall that follows

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

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Ninjanomicon: When the ninja is no longer needed, the ninja shall lay down his sword

When Randy lies that his name is Ranginald Bagel (voiced by Gilbert Gottfried), he puts the real Ranginald Bagel in danger of McFist's fury.

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Ninjanomicon: The ninja who looks the other way, fails to see the attack

Due to their ability to break McFist products, the boys become product testers at McFist Industries and inadvertently help Viceroy an indestructible ninja-seeking robot.

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Ninjanomicon: A problem at a distance may be a solution up close

Randy and Howard follow Theresa Fowler (voiced by Sarah Hyland) and the rest of their classmates to a cool new club downtown only to discover that the Sorceress (voiced by Jennifer Tilly) has returned to seek revenge on the Ninja.

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Ninjanomicon: A hero sacrifices all to save the day

During the 50th Anniversary Celebration of McFist Industries, the Ninja outs McFist as a villain to the entire town. But with his cover blown, McFist is finally able to focus all of his power on destroying the Ninja.

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Ninjanomicon: Provoke your enemy and he will fight back

Randy becomes so dependent on the Nomicon's wisdom that he goes to it for advice on everything. To teach him a lesson, the Nomicon traps him inside and puts an alternate consciousness in Randy's body, forcing Randy to try to find a way out of this mess.

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Ninjanomicon: A ninja without balance will fall

Randy and Howard accidentally stumble back in time and must help the original Ninja (voiced by Joel McHale) battle the Sorcerer. Adam Pally guest stars as Plop Plop.

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Ninjanomicon: You cannot right the future, until you write the past

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 robot that will destroy the Ninja for McFist.

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Ninjanomicon: Hope is the light that vanquishes all shadows

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

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Ninjanomicon: The easy road often makes for a hard journey

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

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Ninjanomicon: The Sorcerer's Chaos Orbs

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

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Ninjanomicon: Beware the wrong words from the right person

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

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Ninjanomicon: The Sorcerer's origin

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.

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Ninjanomicon: The jealous dragon slays what it should protect

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 getting kicked out of their band.

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Ninjanomicon: The wrong not righted pays back ten-fold

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

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Ninjanomicon: Danger lies in protecting that which needs no protection

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

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Ninjanomicon: Only when the student is willing to learn will the teacher appear

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.

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Ninjanomicon: The Ninja who avoids a battle ends up fighting a war

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.

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Ninjanomicon: Deception is a blade that cuts both ways

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

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Ninjanomicon: Sometimes the only way to push forward is to pull back

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

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Ninjanomicon: A ninja's wants must not blind him to others' needs

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

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Ninjanomicon: The mask worn too long becomes the face

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

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Ninjanomicon: Forbidden knowledge of the Shadow Warrior: Halloweenja suit, The Essence of Terror

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.

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

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Ninjanomicon: A true ninja is always victorious

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.

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Ninjanomicon: Ninja Hydro-hand

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

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Ninjanomicon: A ninja's choices must be chosen by his own choosing

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.

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Ninjanomicon: The ninja can take a sick day

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.

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Ninjanomicon: Don't go in someone else's house

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

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

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Ninjanomicon: The Ninja belongs to everyone

Randy has to prove to Howard that he is a better mastermind than him, but unfortunately, Evil Julian has the power ball to destroy the ninja.

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Ninjanomicon: The unexpected is never expected

Randy and Howard claim to have encountered a "chuckacabra," this brings the attention of famous TV explorer Brawn Brickwall to come to Norrisville.

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Ninjanomicon: Glory unearned is inglorious

Debbie Kang figures out Randy Cunningham is the Ninja. She goes to reveal her discovery on Heidi's Me-Cast.

The guardian Plop Plop is removed from his post by Randy and Howard, causing trouble for all of them.

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Ninjanomicon: The Ninja's quest to replenish Plop-Plop's food supplies who also guards one of the Sorcerer's Chaos orbs in the Sacred Temple

Viceroy begins ripping off designs from the cartoon Rorg: A Hero of a Past for his destroy-the-ninja robots.

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Ninjanomicon: To defeat your enemy, you must know which enemy you are fighting

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

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Ninjanomicon: He who deserves the blame must blame himself/He who deserves the blame can only blame himself

During Norrisville High's Saturday school, Howard becomes a genius.

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Ninjanomicon: When you use a friend you gain an enemy

Ninja fan, Rachel writes a song for the Ninja. Seeing this, Ninja decides to spend the day with her.

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Ninjanomicon: He who relies on others for everything can rely on himself for nothing

New kid Howard Weinerman doesn't believe in the Norrisville Ninja. Six-year-old Randy is determined to prove to Howard the Ninja is real by getting them to sneak into Norrisville High.

After Randy and Howard sell Ninja-weapons to Gene Levine, Viceroy decides to buy them for his latest ninja-destroying-plan.

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Ninjanomicon: In battle, a warrior's weapons can be used against him

Doug gets replaced by Howard as the Norrisville High mascot.

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Ninjanomicon: Harmony cannot be made with a single note

Both getting trapped in Scrap City, Hannibal and the Ninja must work together to escape.

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Ninjanomicon: Victory lies in facing the greatest danger first

Howard is accidentally launched into space by Randy.

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Ninjanomicon: Sometimes protecting someone is the most dangerous thing a Ninja can do

Slimovitz gets fired as principal and an experimental computer program is put into the job.

Randy and Howard come up with a prophecy that mentions they can't be separated or else, to scare Slimovitz into not separating them after saying he would if the two didn't improve their grades.

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Ninjanomicon: The answer is in the book

Attempting to get party-practice, Randy and Howard get kicked out of a party and try to find a way back in.

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Ninjanomicon: The Ninja who holds himself highest has the furthest to fall

The feud between, PJ McFlubbuster and Charlie Clucker's develops into a war.

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Ninjanomicon: The Ninja that takes more than he needs gets more than he wants

Cake Fries are taken off the Norrisville High Cafeteria menu leading the students to oppose after a legendary defender of school justice rises from the history books.

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Ninjanomicon: He who attacks without cause has no cause to attack

Randy uses the Ninja to ruin McFist's vacation causing McFist to attack back, ruining Randy and others' spring break.

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Ninjanomicon: An enemy at peace should be left at peace

Howard blames his fart on the Ninja. NHS students continue to laugh at the Ninja, leaving Randy unnerved.

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Ninjanomicon: A ninja does not take light matters seriously

While on a field trip to Little Norrisville, Howard discovers a mysterious ancient wishing idol. An ominous figure is in search of it as well and will stop at nothing to get it.

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Ninjanomicon/The Shopkeeper: One who Receives all that thy desires, ends up in with none thing

Norisvillians mysteriously begin looking for the power balls. Howard unintentionally goes searching and finds one, leading the crazed townsfolk to come after him.

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Ninjanomicon: You must protect the balls at any cost

Part 1: Randy discovers his family is moving, so he goes to defeat Evil Julian once and for all before they leave.

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Part 2: After falling into the Land of Shadows, Randy and Howard must find their way back to Norrisville to stop Evil Julian.

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Ninjanomicon: When facing an unbeatable enemy seek an unlikely ally