1Johnny Goes Nuts
Johnny is finally old enough to participate in Porkbelly’s Annual Running of the Squirrels, but he has to get past Lila, who thinks it’s too dangerous, despite performing many dangerous attempts on her son to stop him.
2Johnny Daddy Day
Johnny, the twins and Lila realize it’s Father’s Day, and they don’t have a gift. They try many disastrous attempts, making Hugh wish they had never remembered!
3Johnny Cruise
Johnny wins an ocean cruise for him and his family, but it turns to be just a trap by Bling-Bling Boy, who deliberately crashes the ship so he can romantically save Susan.
4Rated J for Johnny
Johnny tries various schemes to buy an M-rated video game, not knowing what the consequences will be.
5Spotless Johnny
After Johnny and Dukey track mud in the house, they use a special stain-remover designed by Susan and Mary, but also learn it can make Johnny invisible.
6Johnny vs. Bling-Bling: The Ultimate Battle
Tired of all of the Johnny vs. Bling Bling battles with no winner, the Test sisters and Bling-Bling's science team make a bet to see who is the final winner of the battles.
7Cat Scratch Johnny
Johnny and Dukey bring characters in a science-fiction movie to life with Susan and Mary's 3-D glasses, and now the aliens in the movie want to conquer the Earth.
8Johnny of the Deep
Mary turns Johnny and Dukey into sharks when Bling Bling Boy hypnotizes Susan into falling in love with him.
9Johnny Swellville
A time-traveling mishap sends Johnny and Dukey back to the 1950s.
10Johnny Irresistible
Johnny wants to increase his charisma when he becomes jealous of Gil's popularity.
11Johnny's Rat Race
Johnny uses his sisters' genetically altered rat for a school project, only to have it stolen by a desperate circus owner to save his failing show.
12Black & White & Johnny All Over
Johnny and Dukey help Mr. Black and Mr. White catch a runaway robot dog before it explodes.
13Lawn Gone Johnny
Johnny, his friends, and his enemies compete with each other in a lawn mower race.
14Johnny's Ultimate Treehouse
Johnny "borrows" his sisters' worker drones to build the ultimate treehouse to impress Sissy, but ultimately ends up failing.
15Johnny Goes Camping
When Johnny is ordered by his school to go camping with his father, he uses his sisters' ray gun to turn Dukey into a monster to scare his father out of it, only to have Bigfoot fall in love with monster Dukey.
16Johnny's World Prank Wars I
Johnny competes with his family, his friends, and his enemies in a prank war. Error: When Johnny said to Dukey an escape plan, Dukey said look it's Gill.When Mr. Mittens [ aka.Super kitty prakster S.P.K. for short.] said I can't beleve you fell for it meanen it was a prank.
17How to Become a John-i Knight
Aliens from a meat-themed planet ask Johnny to protect their home world from Dark Vegan who wants to destroy it out of frustration because of his failure to make the perfect toast.
18The Return of Johnny Super Smarty Pants
The Super Smarty Pants possesses an Eskimo to get to Johnny, where it kicks him away and possesses Johnny, making him the smartest kid in school. Not wanting to be outsmarted, his sisters go to great lengths to de-pants him.
19Fangs a Lot Johnny
Johnny accidentally turns his sisters into vampires, and has to save Gil from getting bitten by his lovestruck vampire sisters and change them back.
20Johnny Testosterone
Johnny eats all of the peach yogurt, not knowing that each container is filled with growth serum, and becomes a Hulk monster, causing destruction.
21Johnny's Keys to Success
Susan and Mary make a key for Johnny that can open any lock in Porkbelly, but people try to steal it for their own benefits.
22Johnny's Winter Jacket
When Johnny's mom makes him wear a big winter coat, he is teased at school. However, Mr. Black, Mr. White, and the General ask Susan and Mary to make some sort of weapon to destroy aliens if they ever attacked, so they make Johnny's jacket the weapon.
23Johnny Two-Face
Tired of Johnny's constant lying, Susan and Mary attach a second mouth to him that does nothing but tell the truth.
24Johnny Susan, Susan Johnny
Susan swaps bodies with Johnny so that she and Mary can get a men-only science award.
25Johnny Trick or Treat
Johnny spends the night in a haunted house with Dukey and Jillian to win a ton of candy.
26Nightmare on Johnny's Street
Johnny stays up half the night to watch a six-hour Halloween monster-movie marathon, then steals his sisters' dream machine (thinking it to be an alarm clock) so that he will be able to wake up in time for school the next day; however, he has nightmares during the night which the device brings to life.
- 27
My Dinner with Johnny
Tired of Johnny's repulsive eating habits, Hugh challenges him to a bet to see if he can go one full meal without complaining about his food or making rude noises.
- 28
Johnny Alternative
When Johnny and Dukey get tired of the same old Porkbelly, they ask the girls to make it seem more fun. But they accidentally get sent to an alternate universe where they find that everyone (including themselves) is the opposite gender.
- 29
Cool Hand Johnny
Johnny and Dukey try to escape when they are imprisoned by Wacko in a video game.
- 30
Roller Johnny
Susan and Mary turn Johnny and Dukey into girls so that they can win the grand prize at a roller derby match, but things quickly get difficult when a blow on the head gives Dukey amnesia, and he thinks that he is a real derby queen.
- 31
A Holly Johnny Christmas
The Tests try to get Johnny a new toy when it sells out in the local shopping mall.
- 32
Johnny's First Annual Snowball
Johnny invites everyone to his house for a snowball fight, but forgets to put the word "fight" on the invitation, which misleads everyone into believing it's actually a "Snow Ball" dance.
- 33
Lakeside Johnny
Johnny heads to summer camp and battles in a boating competition against rival rich-kid campers.
- 34
Johnny Germ Fighter
Johnny's dad gets fed up with his filthy bathroom and demands Johnny to clean it up but when Johnny uses his sisters' special germ foam and his dad's cleaning products, problems arise as it causes the germs to grow out of control.
- 35
Johnny's World Record
Johnny is determined to break a world record so he can get into the Frothy Book Of Crazy, Inane & Useless Records.
- 36
Mush, Johnny, Mush
Johnny, his friends, and his enemies take on a snooty rich boy in a dog sled race.
- 37
Johnny's Treasure
Johnny, Dukey, and the girls set out to find the treasure of Pie-Eyed Pat when they find his treasure map in the attic.
- 38
Extra Credit Johnny
Johnny must do some extra credit for school, or he will fail the course and have to make it up in summer school.
- 39
Johnny's Left Foot
When Johnny breaks his foot in a dangerous stunt, which Hugh and Lila ground him for, his sisters step up to create a robotic one for him.
- 40
Johnny vs. The Tickler
Angry at Johnny for having Wacko put in jail, his brother The Tickler decides it's time for him to stop Johnny once and for all, so he kidnaps Susan and Mary and takes their lab, forcing Johnny to seek help in unexpected places.
- 41
Bugged Out Johnny
Johnny and Dukey try to catch bugs, only to come upon a ladybug with a voracious appetite.
- 42
Johnny Test's Quest
Bling-Bling tries to get Susan once again, but his henchmen soon rebel against him by tying him up with Susan.
- 43
Johnny-O's
Sick of cheap cereal prizes that don't work, Johnny decides to make himself a new breakfast cereal. But everything goes haywire when Johnny decides to put in real ray guns made by his twin sisters, and the entire town of Porkbelly becomes a city of chaos and destruction of what anyone chooses to destroy.
- 44
It's Du-Kay Johnny
When Dukey's DNA begins to degrade, reverting him into a normal dog, the girls attempt to upgrade it, but their upgrade goes overboard, turning Dukey into a rich, snooty dog.
- 45
Magic Johnny
Johnny tries to prove to Sissy that he can do magic so he gets his sisters to help him.
- 46
Dolly Johnny
Johnny disagrees to help the girls test experiments so they create a special doll that can control Johnny but Johnny seeks revenge and creates special dolls that can control the girls.
- 47
Johnny McCool
Johnny becomes Speed McCool's new stunt man.
- 48
It's an Invasion, Johnny
Black and White get into trouble in outer space and the kids must save them.
- 49
It's All Relative, Johnny
Johnny and Dukey go back in time to meet Johnny's ancestor in order to write a report about him.
- 50
Johnny Rich
The Tests become rich when they sell one of Susan and Mary's inventions, but Bling Bling is jealous and goes to war with them.
- 51
Johnny X... Again? (JX9)
Johnny visits Reptoslicer and his family, but Reptoslicer then tries to eat Porkbelly.
- 52
Green Johnny
When Earth Day approaches, Johnny is visited by three ghosts.