The WORST episodes of Johnny Test

Every episode of Johnny Test ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Johnny Test!

Crafty 11-year-old Johnny Test and his genetically modified talking dog go on high-octane adventures to save his family (and the world) from disaster.

Last Updated: 9/16/2026Network: Cartoon NetworkStatus: Ended
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#1 - Rock-a-Bye Johnny

Season 2 - Episode 26 - Aired 5/12/2007

Dukey keeps Johnny up all night with his pillow fights and Johnny goes to the sisters to get some sleep. But Johnny misfires and causes his parents to go sleepwalking.

Johnny's Left Foot
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#2 - Johnny's Left Foot

Season 5 - Episode 39 - Aired 3/22/2012

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.

Johnny vs. The Tickler
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#3 - Johnny vs. The Tickler

Season 5 - Episode 40 - Aired 3/22/2012

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.

Bugged Out Johnny
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#4 - Bugged Out Johnny

Season 5 - Episode 41 - Aired 3/23/2012

Bugged Out Johnny - Johnny and Dukey try to catch bugs, only to come upon a ladybug with a voracious appetite.

Johnny Test's Quest
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#5 - Johnny Test's Quest

Season 5 - Episode 42 - Aired 3/23/2012

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.

Johnny O's
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#6 - Johnny O's

Season 5 - Episode 43 - Aired 4/23/2012

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.

It's Du-kay, Johnny
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#7 - It's Du-kay, Johnny

Season 5 - Episode 44 - Aired 4/23/2012

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.

Magic Johnny
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#8 - Magic Johnny

Season 5 - Episode 45 - Aired 6/6/2012

Magic Johnny - Johnny tries to prove to Sissy that he can do magic so he gets his sisters to help him.

Dolly Johnny
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#9 - Dolly Johnny

Season 5 - Episode 46 - Aired 6/6/2012

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

Johnny McCool
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#10 - Johnny McCool

Season 5 - Episode 47 - Aired 6/20/2012

Johnny McCool - Johnny becomes Speed McCool's new stunt man.

It's an Invasion, Johnny
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#11 - It's an Invasion, Johnny

Season 5 - Episode 48 - Aired 6/20/2012

It's an Invasion, Johnny - Black and White get into trouble in outer space and the kids must save them.

It's All Relative, Johnny
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#12 - It's All Relative, Johnny

Season 5 - Episode 49 - Aired 7/25/2012

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.

Johnny Rich
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#13 - Johnny Rich

Season 5 - Episode 50 - Aired 7/25/2012

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.

Johnny X...Again? (JX9)
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#14 - Johnny X...Again? (JX9)

Season 5 - Episode 51 - Aired 8/8/2012

Johnny X...Again? (JX9) - Johnny visits Reptoslicer and his family, but Reptoslicer then tries to eat Porkbelly.

Green Johnny
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#15 - Green Johnny

Season 5 - Episode 52 - Aired 8/8/2012

Green Johnny - When Earth Day approaches, Johnny is visited by three ghosts.

Extra Credit Johnny
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#16 - Extra Credit Johnny

Season 5 - Episode 38 - Aired 3/21/2012

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.

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#17 - Johnny of the Jungle

Season 2 - Episode 22 - Aired 4/28/2007

While on a class trip to the safari park with Dukey disguised as Johnny's dad, Johnny and Dukey decide to help animals get to their homeland in Africa.

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#18 - Johnny vs. Super Soaking Cyborgs

Season 2 - Episode 20 - Aired 4/21/2007

Susan and Mary create Gil cyborgs to make Gil jealous but they try to eliminate Gil and anyone in their path. It's up to Johnny to stop them. Meanwhile, the girls keep Gil "safe" in a box in their lab.

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#19 - Phat Johnny

Season 2 - Episode 10 - Aired 12/3/2006

An accident in Eugene's lab leaves Johnny overweight like him. Johnny uses his weight to become a rapper and to get a video game that he wanted. However, karma is after him and ruins his experience.

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#20 - Johnny Meets the Pork-Ness Monsters

Season 2 - Episode 18 - Aired 3/3/2007

It is a hot day and Johnny's family cannot seem to find a place where they can cool off and get wet. They go to Lake Pork-Ness, which is rumored to have a monster inhabitant. Susan and Mary believe that the idea is a total myth and try to prove there are no monsters in the lake.

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#21 - Johnny's Turbo Toy Force

Season 2 - Episode 2 - Aired 10/28/2006

An evil toymaker named Wacko gives out robots to all the children of Porkbelly, which imprison them. The gang seeks assistance from the Turbo Toy Force.

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#22 - Johnny the Kid

Season 2 - Episode 16 - Aired 2/24/2007

Johnny and his family go on vacation to a dude ranch on Susan and Mary's choice, but it is invaded by an outlaw motorcycle club shortly after they arrive. With the help from Bling-Bling Boy and Gil, both whom have also been taken a trip to the ranch, the Tests resolve to stop the bikers from ruining their fun and take back their holiday.

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#23 - Johnny Mint Chip

Season 2 - Episode 8 - Aired 11/18/2006

Johnny, Dukey, and the sisters go to an ice cream factory, in order to get the recipe for mint chip ice cream which Johnny and Dukey can't stop eating.

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#24 - Johnny Zombie Tea Party

Season 2 - Episode 14 - Aired 1/17/2007

Johnny brings Porkbelly's founders back to life in order to help with his report.

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#25 - Johnny vs. Bling-Bling Boy 2

Season 2 - Episode 4 - Aired 11/4/2006

Eugene creates a device that turns himself, Johnny, and Dukey into young children, interfering with Johnny's video game showdown with Sissy.