Johnny's New Baby Sisters
E1
Susan and Mary purposely turn themselves into babies while the parents are out, and Johnny has to keep them safe from the irresponsible babysitter Gil; this interferes with a party he and Dukey had been planning.
Porta Johnny
E2
Johnny tricks his sisters into letting him have teleporting powers. Susan and Mary mess with the powers to get revenge. Later the twins accidentally get them caught in a middle of an art robbery.
Join the Johnny Scouts
E3
After Johnny lands his bike into a garbage truck, he becomes a Lady Bird Scout and tries to sell 1,000 boxes of cookies to get a new one. Little does he know, Sissy wants the bike as well, but for a better reason.
Johnny BC
E4
Johnny goes back in time in order to get a sloth bone for the twins, but when he returns he becomes a caveman, interfering with his grounding from selling Hugh's personal items.
Runaway Johnny
E5
Johnny and Dukey run away when Johnny's parents say he's old enough to do chores but not old enough to watch PG-13 movies.
Johnny on the Spot
E6
Johnny steals a portable black hole, which later creates an early apocalypse.
Dark Johnny
E7
Johnny joins forces with Dark Vegan to get him back to his home planet.
No Homework for Johnny
E8
Susan and Mary build Johnny a robot in order to help him do his homework, but the robot ends up stealing things for Johnny.
Papa Johnny
E9
Susan and Mary switch Johnny and Hugh's brains after the two make a bet that involves taking on each other's lives.
The Johnnyminster Dog Show
E10
Johnny and Dukey try to get in a dog show which only allows perfectly groomed and trained dogs.
Dukey Jekyll and Johnny Hyde
E11
Dukey drinks a liquid which makes him turn into a monster. To make matters worse, a dog catcher (and later Mr. Black and Mr. White) are after him.
Johnny's Trophy Case
E12
Johnny wants to get a trophy to put in his trophy case. Susan and Mary get obsessed with winning, so the three of them enter The Pork Belly River Jumpoff to win 1 million dollars and a trophy.
Johnny's Amazing Cookie Company
E13
Susan and Mary make fortune cookies that come true, and Johnny sells them with the typical drastic results.
Johnny's Big Dumb Sisters
E14
The twins' latest invention accidentally makes them dumb thanks to Johnny right before their scholarship interview.
My Johnny Guard
E15
Johnny gets hired to stop Bling-bling from kissing Susan, but Johnny turns on the sisters once Bling-Bling bribes him.
Tom and Johnny
E16
Johnny turns into a mouse for Susan and Mary, but when Mr. Mittens comes, things get chaotic. This episode is a parody of Tom and Jerry.
The Quantum of Johnny
E17
Johnny tries to get invited to a party to stop a villain. NOTE: Susan and Mary don't appear in this episode.
Johnny Get Yer Gum
E18
Mr. Whacko invents a new helium gum that lifts kids into the sky, and Johnny must save them.
Old School Johnny
E19
Johnny travels to 1845 when school was easier, but he gets stuck there because the power supplier to the Turbo Time Tea house hasn't been invented yet. The sisters and Johnny try to find outdated technology to power the tea house.
Johnny Degrees Below Zero
E20
Johnny creates a magnetic force field on the Earth which makes Porkbelly the new north pole.
Johnny Johnny
E21
Johnny and Dukey get framed for stuff that Johnny and Dukey look alike robots (which Mr. Black and Mr. White made) do around Porkbelly.
Johnny Double Coupons
E22
Johnny keeps attempting to ride down Suicide hill, but Susan and Mary keep redeeming Johnny's coupons.
X-Ray Johnny
E23
Johnny gets X-Ray goggles.
The Destruction of Johnny X
E24
Johnny and Dukey decide to remain in super hero mode permanently but find being a superhero is harder than they think.
iJohnny
E25
The twins upgrade Johnny's new cell phone. Later the phone becomes too intelligent and begins hacking government space missiles.
Johnny vs. The Mummy
E26
Johnny goes on a trip to the museum and brings the things to life, including a mummy.
Johnny Grow Your Own Monster
E27
Johnny's mail order foam monster becomes a real monster once the twins swap the water with their bottle of "side effects".
Who's Johnny
E28
When Sissy considers Johnny too gross to help her in a science project, he begs Susan and Mary to change his personality.
Princess Johnny
E29
Johnny poses as a princess in order to prevent a war. Meanwhile, Susan and Mary decide that they would like to act like normal girls.
99 Deeds of Johnny Test
E30
After getting his 99th detention, Johnny learns he must perform 99 good deeds or he will be sent to military school.
Johnny's Amazing Race
E31
Johnny and Dukey challenge his sisters, their friends, and their enemies to a survival challenge in which the winning team gets hundreds of dollars in gift certificates.
Johnny Test in 3D
E32
While the tests go on vacation, Johnny and Dukey try to get back into their hotel room and avoid the hotel manager that doesn't allow pets.
Guess Who's Coming to Johnny's for Dinner
E33
Mr. Black moves in with the Tests after he embarrasses Mr. White at the dance contest auditions.
Johnny's New BFF
E34
Johnny's parents keep setting Johnny up with new friends. When those don't work out, Johnny reveals Dukey's intelligence. Later, Dukey spends more time helping Johnny's parents instead of playing with Johnny.
Johnny vs. Bling Bling IV
E35
Johnny once again has to protect Susan from Bling Bling Boy who is determined to have her as his valentine.
Johnny's Big Sister Smackdown
E36
Susan and Mary both want Gil to go on a date with them, so they put up a wrestling match using rough guts (Susan uses Johnny's while Mary uses a lion's), but it leads to destructive results.
Sunshine Malibu Johnny
E37
Johnny goes to the beach to surf, but there are no waves, so Susan and Mary build a wave making machine and special surfboard for him.
Johnnyicle
E38
Johnny and Dukey try to help Brain Freezer get a girlfriend.
King Johnny
E39
Johnny becomes obsessed with domination after Susan and Mary bring his chess pieces to life.
Johnny Re-Animated
E40
Johnny uses one of his sisters' inventions to bring two cartoon characters to the real world in order to scare Sissy out of the house, but the characters mistake Porkbelly for a zombie world and try to destroy it.
Johnny Cakes
E41
It's Lila's birthday and the family spends the morning to make her birthday a success. Johnny struggles to make her breakfast, Hugh tries to figure out a good but inexpensive gift for her, and the twins keep trap Lila in her bedroom until Hugh and Johnny are ready.
Johnny Tube
E42
Johnny wants to become a internet sensation.
Sleepover at Johnny's
E43
Johnny is dragged into Susan and Mary's plan to get Gil to be in a sleep-over, but Bling-Bling Boy and Dark Vegan's daughter Jillian become involved as well, with the usual chaos ensuing.
Johnny's Got a Wart!
E44
Johnny gets a wart, and when his sisters try to get rid of it, it gives the wart intelligence and seems to make Johnny's life better, but he tries to take over his body as he gets more powerful.
Johnny's Royal Flush
E45
When Susan and Mary turns Johnny into a fish as part of one of their experiments, Hugh flushes him down the toilet by mistake where he ends up in the sewer, and he has to swim for his life when he runs into an alligator.
Johnny Test's Day Off
E46
Johnny ditches school with a relentless truant officer in hot pursuit.
Johnny & Dark Vegan's Battle Brawl Mania
E47
Dark Vegan once again tries to destroy Johnny, who is trying to cheer up lonely Repto-Slicer.
A Scholarship for Johnny
E48
Hugh wants to train Johnny to be good at sports so that he could get a sports scholarship to college.
Johnny Boat Racing
E49
Johnny, his friends, and his enemies all compete in a boat race against an arrogant rowing team.
Johnny Lock Down
E50
Johnny is determined to get a flytrap plant from his sisters for his school's science fair.
Good Ol' Johnny Test
E51
Johnny is in charge of the school play about recycling while Susan and Mary create a garbage-eating monster.
Johnny X Strikes Back Again
E52
The general takes away the lab, and than builds agent cyborgs. They charge up Johnny X and their friends to stop them!