The BEST Episodes of Johnny Test
Every episode ever - ranked by fan votes!
Last Updated: Feb 21, 2021
Network: Cartoon Network
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. Johnny Test is an American-Canadian animated television series produced by Warner Bros. Animation, for the first season, and Cookie Jar, for the remainder of the series. It premiered on Kids' WB, on September 17, 2005, which continued to air the series through its second and third seasons. The rest of the series aired on Cartoon Network, from its debut on January 7, 2008, in the United States and internationally. In Canada, the series aired on Teletoon, premiering September 8, 2006.
#1 - Return of Johnny X
Season 1 - Episode 17 - Aired Nov 26, 2005
Johnny becomes Johnny X again in order to take down Bling-Bling's latest evil invention, Repto-Slicer.
9.35 #2 - Dog Days of Johnny
Season 1 - Episode 19 - Aired Feb 11, 2006
Susan and Mary put a device on Dukey, making him respond to their every command. Now Johnny must stop Susan and Mary, and get his best friend back.
9.35 #3 - Johnny Hollywood
Season 1 - Episode 15 - Aired Nov 19, 2005
Johnny uses a gadget to travel into a movie, The Quickest and the Monkiest. But what happens when the gadget gets stuck and the movie has a bad ending?
9.34 
#4 - Johnny vs. Smash Badger 3
Season 2 - Episode 23 - Aired May 5, 2007
While trying to figure out some cheat codes from his video game, Johnny accidentally brings Smash Badger to life.
9.31 
#5 - Downhill Johnny
Season 2 - Episode 17 - Aired Mar 3, 2007
Johnny goes to the Behemoth, the ultimate downhill ski resort. However, he has to find ways to go downhill since the ski captain doesn't let kids go.
9.26 
#6 - Saturday's Alright for Johnny
Season 2 - Episode 7 - Aired Nov 18, 2006
Johnny is trying to have the perfect Saturday, but Sissy ruins it by trying to practice William Tell archery on Johnny. Johnny then uses Susan and Mary's Saturday Repeater machine to try again.
9.20 
#7 - Johnny Test in Black & White
Season 2 - Episode 15 - Aired Feb 24, 2007
Johnny and Dukey shrink themselves, and end up in Mr. Black's stomach and brain to make him forget that the General told Mr. Black and Mr. White to spy on Susan and Mary to stop them from doing dangerous experiments.
9.17 #8 - Johnny and the Mega Roboticles
Season 1 - Episode 13 - Aired Nov 12, 2005
Johnny brings a toy, Nasteria, to life. But the toy decides to destroy Porkbelly. Now Johnny needs to stop the evil action figure with a toy force, led by Nasteria's arch enemy, Mega Roboticle.
9.17 
#9 - 101 Johnnies
Season 2 - Episode 13 - Aired Jan 17, 2007
Johnny makes 100 robot clones in order to do his chores for him, but the clones become defective soon after.
9.14 
#10 - 00-Johnny
Season 2 - Episode 21 - Aired Apr 28, 2007
Tim Burnout steals blueprints of the girls' original plan to alternate Dukey and uses it on his cat, Mr. Mittens. But he becomes evil and now it's up to Johnny and Dukey to stop him.
9.11 #11 - Johnny’s Super Smartypants
Season 1 - Episode 11 - Aired Nov 5, 2005
Johnny wears super smarty pants in order to win the love of a genius girl, Janet Nelson Jr. But later, the pants get a mind of their own.
9.05 
#12 - Johnny's Pet Day
Season 2 - Episode 9 - Aired Dec 3, 2006
Dukey gets jealous when Johnny takes Repto-Slicer to school for pet day and not him. However, this lands him into danger of becoming a TV star.
9.00 
#13 - JTV
Season 2 - Episode 3 - Aired Nov 4, 2006
Johnny starts his own channel over a channel which only broadcast emergencies and tests. Later, the army needs the channel for a runaway plane. Note: Family Guy's season 4 episode 14 is called / named PTV
9.00 #14 - Deep Sea Johnny
Season 1 - Episode 7 - Aired Oct 8, 2005
Johnny uses an invention to breathe underwater, yet sharks and electric eels begin to walk on land and wreak havoc to the beach.
9.00 
#15 - Hoist the Johnny Roger
Season 2 - Episode 1 - Aired Oct 28, 2006
Johnny and Dukey must help a pathetic pirate, Nobeard, take down his powerful brother pirate, Blackbeard, and impress his father, Greybeard. Johnny goes back to the future to get his sisters' help.
8.95 #16 - Johnny and the Ice Pigs
Season 1 - Episode 9 - Aired Oct 29, 2005
Johnny goes back in time to ask Thomas Edison for a hockey invention and then to gather all of the vicious and ruthless "legends" he could find, in order to form a hockey team which will help the Ice Pigs win a game.
8.91 
#17 - Johnnyland
Season 2 - Episode 5 - Aired Nov 11, 2006
Johnny makes a theme park called Johnnyland in the backyard. However, Hugh demands the park be torn down, later stumbling into an unstable ride with Lila.
8.79 #18 - Johnny's Extreme Game Controller
Season 1 - Episode 21 - Aired Feb 18, 2006
Johnny uses his game controller to control people, but Hugh gets his hands on it and begins affecting Johnny in the process.
8.71 #19 - Johnny Dodgeball
Season 1 - Episode 25 - Aired Jul 29, 2006
Johnny uses a bionic arm to magnify his arm strength to beat Sissy at dodge ball. However, it breaks after being exposed to cereal.
8.54 #20 - Johnny Test: Party Monster
Season 1 - Episode 5 - Aired Oct 1, 2005
Susan and Mary are having a party and use a device on Johnny in order to make him look good so all the girls at the party will love him, but Johnny turns into a monster.
8.44 
#21 - Runaway Johnny
Season 4 - Episode 5 - Aired Sep 24, 2009
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.
8.11 
#22 - The Revenge of Johnny X
Season 2 - Episode 11 - Aired Dec 10, 2006
Johnny and Dukey must rescue Susan from Bling-Bling Boy in the forms of Johnny X and Super Pooch. Little do they know she doesn't want to be rescued, as Bling-Bling Boy has taken her on a cruise bot with a swimming pool, movie theater, anti-gravity chamber, video arcade, and her favorite restaurants among other luxuries.
7.83 #23 - Johnny vs. Brain Freezer
Season 1 - Episode 23 - Aired Jul 22, 2006
A kid at Susan and Mary's school becomes a villain named Brain Freezer. Now Johnny must stop this villain and unfreeze everyone he froze.
7.83 #24 - Johnny vs. Bling-Bling Boy
Season 1 - Episode 3 - Aired Sep 24, 2005
Bling-Bling Boy has stolen a device that turns things into gold and Johnny must get it back before dinnertime.
7.81 
#25 - Johnny's Last Chapter
Season 6 - Episode 52 - Aired Jun 18, 2014
Johnny and Dukey are sucked into a history book.
7.79