"Flume-Igation" – 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 Poolfront" – On the hottest day of the year, Mort Weinerman is finally able to bu...
"Welcome Back Catfish" –Catfish Booray returns to Norrisville High as a substitute teacher. "All the Juice That's Fish to Swim" –Randy and Howard put investigative reporter Debbie Kang on the trail of the Ninja's secret identity.
"Julian's Birthday Surprise" –Randy brings the Sorcerer’s Ball to Julian's magic-themed birthday party and accidentally unleashes its power. "True Bromance" –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.
Levander Hart is still angry at Randy and Howard and is plotting his revenge. Randy and Howard discover that Viceroy has replaced Whoopee with the evil Whoopee 2.
Randy and Howard must take care of a bologna “baby” for science class. Bucky creates a Ninja theme song and Ninja’s attempts to shut it down only make it more popular.
Randy makes up a fake fudge factory and puts himself in grave danger. Randy uses the Nomicon to cheat at the "Best Buds" food-tasting competition and give himself super-senses.
When Randy finds and falls in love with Viceroy’s beloved “pet” Otto, he refuses to give it back. Randy goes undercover to infiltrate Bash's inner circle.
Randy unleashes the terrifying orange HalloweeNja suit… only to discover it’s a force he can’t control! Randy torments Howard on Halloween with the ghost story "Mud Fart".
Randy and Howard decide to use Ninja-ing to even the laser tag playing field. Stuck in a dream-within-a-dream-within-a-dream, Randy must figure out how to escape the loop.
Howard must save Greg’s Game Hole and learn the true meaning of Hanukkah. Randy purposely leaves the Nomicon at school so Ninja-ing won't ruin his trip with Howard to Sno-klahoma.
Randy fakes a sick day but Howard figures out a way to get his best friend back to school before lunch. Randy breaks into McFist’s empty house to retrieve a lost boomerang.
Distracted by the "Ninja Fails Live" webcast, Randy seeks the help of the blind sword smith of Norrisville. Ninja sells out and endorses every business in Norrisville.
Howard sets out to prove that he is a true "mastermind" that could defeat the Ninja. Randy and Howard’s fake “Chuck-a-Cabra” video draws the attention of monster hunter.
Journalist Debbie Kang scores the scoop of the century: Randy Cunningham is the Ninja! Randy breaks a sacred rule by removing Plop Plop, the ancient guardian, from his post.
Viceroy has been ripping off a cheesy ‘80s cartoon for all of his bot designs. Howard’s dad Mort thinks Ninja is out to get him, leading to an epic Mort vs. Ninja battle!
Contaminated McBubbleSlam accidentally turns Howard into an A+ student. When Ninja leads on an admirer, he ends up turning his super-fan into a stanked fan.
6-year-old Randy tries to convince new kid Howard that Norrisville has a Ninja. Randy and Howard unwittingly sell used Ninja weapons to Viceroy.
Howard is chosen to be the new school mascot. Ninja and McFist must work side by side if they want any hope of escaping the ruthless bots of Scrap City!
Randy accidentally launches Howard into space with a killer robot aboard the shuttle! Randy and Howard get Slimovitz fired and a computer-based program takes his place.
Principal Slimovitz threatens to split Randy and Howard up unless they improve their grades. Randy and Howard get kicked out of a party and go overboard trying to get back in.
Randy and Howard inadvertently start a war that threatens to destroy their two favorite eateries forever! Slimovitz removes cake-fries from the Norrisville High menu.
Randy gets McFist tossed from the chillest island resort on Lake LaRusso. Howard has to go to the center of the Earth to set the fart record straight.
Randy and Howard come across a Sorcerer's Ball on a field trip to Little Norrisville. Randy accidentally sends Howard on a quest for the final Sorcerer’s Ball.
Randy discovers that his family is moving because Norrisville has become too dangerous, so he decides that he must defeat Cyborg Julian and make his town a safe place to live.