Season 4
52 episodes · Sep 10, 2009
Season Videos
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S4E1Johnny's New Baby Sisters
Sep 10, 200911mSusan 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.
S4E2Porta Johnny
Sep 10, 200911mJohnny 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.
S4E3Join the Johnny Scouts
Sep 17, 200911mAfter 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.
S4E4Johnny BC
Sep 17, 200911mJohnny 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.
S4E5Runaway Johnny
Sep 24, 200911mJohnny 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.
S4E6Johnny on the Spot
Sep 24, 200911mJohnny steals a portable black hole, which later creates an early apocalypse.
S4E7Dark Johnny
Oct 1, 200911mJohnny joins forces with Dark Vegan to get him back to his home planet.
S4E8No Homework for Johnny
Oct 1, 200911mSusan and Mary build Johnny a robot in order to help him do his homework, but the robot ends up stealing things for Johnny.
S4E9Papa Johnny
Oct 8, 200911mSusan and Mary switch Johnny and Hugh's brains after the two make a bet that involves taking on each other's lives.
S4E10The Johnnyminster Dog Show
Oct 8, 200911mJohnny and Dukey try to get in a dog show which only allows perfectly groomed and trained dogs.
S4E11Dukey Jekyll and Johnny Hyde
Oct 15, 200911mDukey 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.
S4E12Johnny's Trophy Case
Oct 15, 200911mJohnny 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.
S4E13Johnny's Amazing Cookie Company
Nov 26, 200911mSusan and Mary make fortune cookies that come true, and Johnny sells them with the typical drastic results.
S4E14Johnny's Big Dumb Sisters
Nov 26, 200911mThe twins' latest invention accidentally makes them dumb thanks to Johnny right before their scholarship interview.
S4E15My Johnny Guard
Dec 3, 200911mJohnny gets hired to stop Bling-bling from kissing Susan, but Johnny turns on the sisters once Bling-Bling bribes him.
S4E16Tom and Johnny
Dec 3, 200911mJohnny 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.
S4E17The Quantum of Johnny
Dec 10, 200911mJohnny tries to get invited to a party to stop a villain. NOTE: Susan and Mary don't appear in this episode.
S4E18Johnny Get Yer Gum
Dec 10, 200911mMr. Whacko invents a new helium gum that lifts kids into the sky, and Johnny must save them.
S4E19Old School Johnny
Jan 7, 201011mJohnny 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.
S4E20Johnny Degrees Below Zero
Jan 7, 201011mJohnny creates a magnetic force field on the Earth which makes Porkbelly the new north pole.
S4E21Johnny Johnny
Feb 4, 201011mJohnny and Dukey get framed for stuff that Johnny and Dukey look alike robots (which Mr. Black and Mr. White made) do around Porkbelly.
S4E22Johnny Double Coupons
Feb 4, 201011mJohnny keeps attempting to ride down Suicide hill, but Susan and Mary keep redeeming Johnny's coupons.
S4E24The Destruction of Johnny X
Feb 18, 201011mJohnny and Dukey decide to remain in super hero mode permanently but find being a superhero is harder than they think.
S4E25iJohnny
Feb 25, 201011mThe twins upgrade Johnny's new cell phone. Later the phone becomes too intelligent and begins hacking government space missiles.
S4E26Johnny vs. The Mummy
Feb 25, 201011mJohnny goes on a trip to the museum and brings the things to life, including a mummy.
- S4E27
Johnny Grow Your Own Monster
May 10, 201011mJohnny's mail order foam monster becomes a real monster once the twins swap the water with their bottle of "side effects".
- S4E28
Who's Johnny
May 17, 201011mWhen Sissy considers Johnny too gross to help her in a science project, he begs Susan and Mary to change his personality.
- S4E29
Princess Johnny
May 24, 201011mJohnny poses as a princess in order to prevent a war. Meanwhile, Susan and Mary decide that they would like to act like normal girls.
- S4E30
99 Deeds of Johnny Test
Jul 5, 201011mAfter getting his 99th detention, Johnny learns he must perform 99 good deeds or he will be sent to military school.
- S4E31
Johnny's Amazing Race
Jul 12, 201011mJohnny 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.
- S4E32
Johnny Test in 3D
Jul 19, 201011mWhile 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.
- S4E33
Guess Who's Coming to Johnny's for Dinner
Jul 26, 201011mMr. Black moves in with the Tests after he embarrasses Mr. White at the dance contest auditions.
- S4E34
Johnny's New BFF
Aug 2, 201011mJohnny'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.
- S4E35
Johnny vs. Bling Bling IV
Aug 9, 201011mJohnny once again has to protect Susan from Bling Bling Boy who is determined to have her as his valentine.
- S4E36
Johnny's Big Sister Smackdown
Aug 16, 201011mSusan 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.
- S4E37
Sunshine Malibu Johnny
Aug 23, 201011mJohnny 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.
- S4E39
King Johnny
Sep 6, 201011mJohnny becomes obsessed with domination after Susan and Mary bring his chess pieces to life.
- S4E40
Johnny Re-Animated
Sep 13, 201011mJohnny 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.
- S4E41
Johnny Cakes
Sep 20, 201011mIt'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.
- S4E43
Sleepover at Johnny's
Oct 4, 201011mJohnny 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.
- S4E44
Johnny's Got a Wart!
Oct 11, 201011mJohnny 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.
- S4E45
Johnny's Royal Flush
Oct 18, 201011mWhen 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.
- S4E46
Johnny Test's Day Off
Oct 25, 201011mJohnny ditches school with a relentless truant officer in hot pursuit.
- S4E47
Johnny & Dark Vegan's Battle Brawl Mania
Nov 1, 201011mDark Vegan once again tries to destroy Johnny, who is trying to cheer up lonely Repto-Slicer.
- S4E48
A Scholarship for Johnny
Nov 8, 201011mHugh wants to train Johnny to be good at sports so that he could get a sports scholarship to college.
- S4E49
Johnny Boat Racing
Nov 15, 201011mJohnny, his friends, and his enemies all compete in a boat race against an arrogant rowing team.
- S4E50
Johnny Lock Down
Nov 22, 201011mJohnny is determined to get a flytrap plant from his sisters for his school's science fair.
- S4E51
Good Ol' Johnny Test
Nov 29, 201011mJohnny is in charge of the school play about recycling while Susan and Mary create a garbage-eating monster.
- S4E52
Johnny X Strikes Back Again
Dec 30, 201011mThe general takes away the lab, and than builds agent cyborgs. They charge up Johnny X and their friends to stop them!