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Voiced by: James Arnold TaylorThe show's protagonist and youngest member of the Test family. Johnny creates many of the show's plots through his willingness to abuse his sister's inventions or cut some corner in life. His best friend is Dukey, his (talking) dog. Occasionally Johnny fights crime using superpowers gained from his sisters under the name Johnny X.
- Aesop Amnesia: Johnny learns lessons. He just never remembers those lessons.
- Ambiguously Bi: Johnny does display interest in girls including Sissy and Jillian Vegan and hates cross dressing but he has Ho Yay with both Dukey and Gil. While it can be argued that Johnny loves Dukey as much like typical boy does with his dog, Johnny's interactions with Gil are somewhat chummy as Johnny is not repulsed at all by Gil's comments towards him and he even accepted Gil's offer to go on a date with him, which involved a candlelit dinner.
- Annoying Younger Sibling: And apparently, he's holding back. He once got his sisters to agree to do something by threatening to somehow be 100 times more annoying...it worked!
- Attractive Bent-Gender: Whenever he dresses like a girl.
- He briefly turned into a beautiful teenage girl during the pilot after using 'Mega Hottie Body Flakes'.
- Blackmail: In the early seasons, around how Johnny convinces his sisters for a favor, the blackmail usually being 'unapproved' experiments.
- Blah Blah Blah: What Johnny always says whenever Susan and Mary try to tell him how their invention works or warn him about overusing it.
- Book Dumb: Clever and manipulative, but a poor academic performer.
- Brilliant, but Lazy: He only SEEMS stupid, he's just too dang lazy to apply it to school or much else. However, if its something that has to be done or he really wants to do, he can come up with plans even his sisters find downright amazing.
- Basically its surmised that while his sisters got all the smarts, he got all of the creativity.
- Can't Get Away with Nuthin': If Johnny uses some advantage for personal benefit, it will almost certainly backfire on him by the end of the episode. In a few instances, he has to use the advantage for the greater good, costing him his benefit.
- Good example is where he obtained x-ray vision to win at a gameshow, the prize being enough money to be set for life. Before he can actually select the suitcase and get the money, Dukey convinces to go and save the library from being taken by the mole people.
- Catch Phrase:"Whoa, Didn't See That Coming!""Say, wha-?""Now where have I seen this before?"
- Character Title: The show's title refers to him.
- Cosmic Plaything: More or less. How terrible his day is depends on the writer.
- Cross Dresser: Johnny does not like having to do this often as a result of either his sister's experiments on him or missions that Mr. Black and Mr. White puts him on
- Crouching Moron, Hidden Badass: The kids got a dunce streak in him. But he always saves the day.
- Dumb Blonde: He's Book Dumb and blonde.
- Expy: For Calvin.
- Ham-to-Ham Combat: Against many of his villains, particularly Bling-Bling Boy.
- Hot-Blooded: Quite excitable.
- Identical Stranger: Johnny looks exactly like Princess Mirabelle, so the SSGA gets him to take her place when the princess goes missing.
- Idiot Hero: In general, the mayhem caused in a good number of the episodes could have been avoided entirely if Johnny hadn't tried using the girls science to get out of chores or school or anything involving effort.
- Jerk with a Heart of Gold: He's an all right kid who still has growing up to do. He does do geuninely friendly things to try and help out.
- Kid-anova: He had a few girls crush over him.
- Large Ham: He doesn't have an indoor voice, especially in the house. He frequently yells a lot.
- Manipulative Bastard: Johnny knows how to grift his parents and sisters to get his way.
- Mistaken for Gay: Its implied that Johnny tries to invoke this trope in the girl scout episode by making fake claims towards his dad that he likes being in the girl scouts as well as dresses and skipping and makeup with his father responding with the words "you don't say". Johnny immediately drops the act and tells his dad that he will stop the girly charade if his dad purchases enough girl scout cookies from Johnny so Johnny could get a brand new bike.
- Nice Job Breaking It, Hero!: Many of the episodes' main threat is his fault in some way. Though in his defense, he always tries to fix it in the end.
- Sensitive Guy and Manly Man: Manly Man to Dukey's Sensitive Guy.
- Stock Superpowers: As Johnny X.
- The Slacker: Johnny hates hard work and would rather lie, cheat and use his sisters experimental and often highly dangerous science than actually do the work.
- Spoiled Brat: Subverted. While he has to resort to Blackmail or begging to get what he wants from his sisters, they more or less often experiment on him as frequently and could be seen as a form of 'payment.'
- Unsympathetic Comedy Protagonist: It can get really hard to root for him.
Voiced by: Louis Chirillo (season 1-4), Trevor Devall (season 5-6)Johnny's talking dog who was genetically enhanced by Susan and Mary some time before the series. Dukey's main job is to act as Johnny's voice of reason even if he's prone to being ignored. That said, he's more than capable of doing the wrong thing himself if properly motivated (such as with steaks). On more than one occasion he acts as a crimefighter alongside Johnny under the monikers Super Pooch, X Pooch or Super Dukey, though after the earliest incidents he expresses a dislike for doing so.
- Action Pet: He is a black-belt in Kung-Fu.
- Ambiguously Gay: Rotates between this and Ambigously Bi depending on the episode. Dukey acts feminine and at one point tried to hump Johnny's leg.
- Ambiguously Bi: He has crushed on Missy despite behaviors suggesting he might be gay.
- Adorkable: Shy, has feminine mannerisms, and a nice dog.
- Bacon Addiction: Dukey loves him some bacon.
- Berserk Button: Harming, trying to kill and/or being responsible for Johnny's mortality in front of Dukey.
- Beware the Nice Ones: You don't want to get on his bad side.
- Big, Friendly Dog: Nearly Johnny's size, and has a sweet nature.
- Brought to You by the Letter "S": On his Super Pooch costume, although the letter is D which appears nowhere in his Super Pooch name.
- The letter in this case is a holdover from when his alter ego was called "Super Dukey". The writers have since flip-flopped on exactly what his superhero handle is between "Super Dukey", "Super Pooch" and "X Pooch".
- Butt Monkey: Gets lots of bodily harm.
- Camp Straight: He displays a lot of effeminate mannerisms which include wearing bike leather in his début, showing an interest in fashion, doing the limp wrist, and in some episodes wore an earring on his right ear yet he showed attraction to Missy and an alternate female version of himself.
- Catch Phrase: "I'm a kid with a rare hair disorder".
- The Chew Toy: Dukey often suffers a lot of injuries as a result of Johnny's shenanigans. One such example was when Johnny tried to break a record and win money by participating in a stunt created by an eccentric billionaire, Dukey tried to stop Johnny from doing the stunt but ended up doing the stint himself by accident, which resulted in him getting injured and put in a full body cast.
- Cowardly Lion: Dukey will never miss an opportunity to complain and cower, but he comes through in the end.
- Deadpan Snarker: When you hang around with Johnny, it comes naturally.
- The Drag-Along: Most of the time unless the situation calls for it.
- Expy: Of Hobbes.
- Funny Animal: An anthropomorphic dog, with emphasis on "funny".
- Gasshole: And he's not too shy about it either...
- Hypercompetent Sidekick: Borderline Beleaguered Assistant. However, his reason of doing matters is only out of being forced to go or Johnny's safety, being Brilliant, but Lazy
- Kid-Appeal Character: Dukey is forced to take on this role due to the fact that Johnny can be really hard to root for at times. Dukey appeals towards kids due to his quirky personality, ability to talk, his tendency to be gassy, and his trademark laughing.
- Large Ham: Dukey enjoys hamming it up.
- Martial Pacifist: Susan and Mary included the DNA of Kung Fu masters in his genetic code, making him a skilled martial artist...however, he doesn't like using it and more often would just prefer to stay at home and goof off than fight supervillains. He also refuses to teach it to Johnny since he knows Johnny doesn't have enough self control not to use it.
- Master of Paper-Thin Disguise: Works due to most people in their world being stupid. He normally just says he's a 'kid with a rare hair disorder' and they believe him. He also sometimes wears a t-shirt that says "Not A Dog". Or, when he's trying to pass himself as a regular dog, he'll just say the word "woof" instead of actually barking.
- Morality Pet: Played with in the fact that although he tried to convince Johnny something is wrong (or right) to do, he often fails at changing Johnny's mind unless it has to do with his family. Also tries to convince the Sisters that treating Johnny like a guinea pig is wrong. Fails in that as well.
- Only Sane Man: Though most anyone looks sane next to Johnny.
- Plot Allergy: In "Lil Johnny", Dukey starts sneezing constantly after he and Johnny get shrunk. Dukey says that he is sneezing because of his allergies but never states what he is allergic to. However, several dust mites appear on screen to attack Johnny and Dukey moments after Dukey states that he is allergic, which implies that Dukey is allergic to either dust or dust mites.
- Screams Like a Little Girl: When he's scared.
- Sensitive Guy and Manly Man: Sensitive Guy to Johnny's Manly Man.
- Sleep Mask: Dukey sometimes wears a pink one in his sleep despite being a dog. Its most prominent in " Green Johnny"
- Trademark Favorite Food: Dukey would do anything for a steak. Or Bacon
- Also enjoys coffee.
Susan and Mary Test
Susan and Mary Test
Susan Voiced by: Maryke Hendrikse
Mary Voiced by: Brittney Wilson (season 1, 5); Ashleigh Ball (season 2-4, 6)Johnny's older twin sisters who attend the Mega Institute of Technology. Both are geniuses capable of devising whatever machine the plot demands and most episodes relate at least partially to one of their experiments. Both Susan and Mary have a crush on local boy Gil that can work against them. Susan is also the object of affection of resident villain Bling-Bling Boy. Both sisters look identical except for their fashion choices (Susan wears squared glasses, a skirt and knee socks and has straight hair; Mary has curved lenses, wears jeans and has curled hair).
- A-Team Firing: Once. Mary attempted to hit a transformed Dukey with the needle containing a serum that will turn him back to normal and every shot hits somewhere on the wall around him.Mary: Man I am a lousy shot.
- Agent Mulder and Agent Scully: Mary and Susan, respectively; they even have the same first letter initial.
- Balloon Belly: Not as often as Johnny or Dukey, but they will gorge themselves on occasion. One time they fattened themselves up with candy, and another they got bloated from eating too much ice cream.
- Butt Monkey: Susan has a lot of slapstick.
- Catch Phrase:
- "We're such geniuses." Well, in the first seasons anyway.
- And "*sighs* Gil, next door".
- Cut Lex Luthor a Check: A non-evil example. The only reason they bother inventing things is to get Gil to notice them. When he says that he's moving away, they immediately shut down the lab forever, and Johnny takes it upon himself to try and stop Gil from moving.
- Dogged Nice Girls: They try their best to win Gil's affections though he doesn't seem to notice them. Admittedly, they do go to some creepy lengths.
- Failure Is the Only Option: Their attempts to attract Gil attention always end in failure.
- Fiery Redheads: Susan tends to be more irritable than Mary is, which often leads to her downfall.
- Love Makes You Crazy: Their attempts to get Gil to notice them always backfires or screws up. Not to mention fighting one another over who will marry Gil, ending up with them becoming a couple of messes, which derives Gil's attention to Johnny.
- Magic Skirt: No matter what she does, Susan's skirt doesn't seem to ever move. Not even if she's sliding, falling, or doing cartwheels.
- Meganekko: Girls with glasses.
- Nice Job Breaking It, Hero!: They end up causing the disaster of the week as often as Johnny, and more often than not end up needing Johnny's help to fix it.
- Not So Different: Susan and Mary's ploys to get Gil's attention can be eerily similar to Bling Bling Boy's attempts to get Susan. For example, they both turned themselves into babies to be sat by their crushes. Interestingly enough, this has not been pointed out as of yet.
- Punny Name: Mary and Susan Test.
- Red Oni, Blue Oni: It's subtle but it's there. Susan is the red: more rational minded, always tries to see if there's logical explanation for everything and can be rather stubborn. Mary is the blue, willing to believe more in the unnatural and is usually the voice of reason between the pair. Ironically, Susan wears a blue shirt while Mary wears a yellow one. There's also a dash of Tomboy and Girly Girl with the way of dress (Susan wearing a skirt and Mary Janes while Mary wears jeans and sneakers.)
- Single-Target Sexuality: They are only interested in Gil even though he's a Dumb Blonde who clearly has no interest in them or even awareness that they exist, no matter how hard they try to get his attention.
- Smitten Teenage Girls: They both have a crush on Gil.
- Slapstick Knows No Gender: Especially Susan.
- Stalker with a Crush: To Gil.
- Sweet Tooth: One episode showed they have a stash of sugary junk food hidden in their lab.
- Theme Twin Naming: Averted because their names are Susan and Mary, which don't rhyme and are not thematic
- Twin Threesome Fantasy: Somewhat averted Depending on the Writer. Sometimes the twins are shown to be open at the idea of sharing Gil, but there are episodes when they fight each other to be the only girl he has eyes for. Marriage seems to be the touchiest point; dating and making out not so much.
Voiced by: Ian James Corlett.He is the patriarch of the Test household and the father of Johnny, Susan, and Mary Test. He is a stay at home dad who does all the housework and is known for declaring that his kids be home on time or else they are grounded. He obsessively loves to cook meatloaf for dinner, which the rest of the Test family hates.
- Abusive Parent: Several episodes have him stating what kind of punishment he plans to give Johnny, many of which are rather cruel. In fact, it is implied in multiple episodes throughout the series that he actually hates Johnny (despite constantly saying he loves him), and will take any opportunity to get rid of him short of outright murder.
- House Husband: He is literally a "house husband."
- Large Ham: Courtesy of Ian James Corlett.
- Lethal Chef: By how much is by Rule of Funny. He is capable of making good food, but he loves making meatloaves and somewhat treats it like an art form though that doesn't mean the meatloaf will be tasty (least to anyone but him.)
- Neat Freak: Hugh is shown to hate germs a lot and likes the house to be extremely clean. One of the heroes he idolizes inspired him to be this. The theme song of this show even directly quotes him as this trope
- Papa Wolf: Despite having effeminate hobbies, Hugh still maintains a solid iron grop on being the man of the house and is very stern towards his children.
- Real Men Wear Pink: Hugh is the man of the house and runs the Test household in a very strict manner but he likes to do chores that are typically that of a housewife's.
- Skewed Priorities: In an episode where Johnny breaks his foot, Hugh is more concerned about the family's insurance premiums going up.
- The Scrooge: An interesting example of this despite not being the breadwinner of the family and lacking the usual reason a dad would have for this.
- Trademark Favorite Food: Meatloaf. Hugh rarely ever cooks anything 'but' meatloaf, and will go to great lengths to not cook anything else but meatloaf. He clearly chooses to ignore the glaringly obvious fact that no one but him likes it, even when his family wretch with horror at the sight of it and Johnny openly states no one else likes it.
- Ungrateful Bastard: He would rather punish his kids rather then thank them for saving the day like the other adults.
- You Are Grounded: He threatens to ground his kids for life constantly even though in one episode, Susan and Mary state that he can't ground children when they are 18, which makes him change his threat to grounding them until they turn 18.
Voiced by: Kathleen BarrShe is the mother of Johnny, Susan, and Mary Test. She is a strict businesswoman who makes the money for the Test household. She,like the other Test family members openly despises Hugh's meatloaf obsession.
Voiced by: Andrew FrancisA pleasant local boy who's friends with Johnny. He's the romantic target of both Susan and Mary, though he can never seem to remember their names.
- Ambiguously Bi: Shown to clearly crush on girls, but seems oddly fixated on Johnny over his twin sisters.
- Brainless Beauty: The boys head is hollow as a coconut.
- Catch Phrase: "Hey, Johnny!", or "Tell Johnny I said hi!" whenever Johnny's not around.
- The Ditz: He's not very bright as he often forgets people such as Susan and Mary. Its revealed that he acts this way because Susan and Mary have frequently erased his memory, damaging his brain in the process.
- Dumb Blonde: Even more than Johnny. Implied to have once possessed at least average intelligence; repeated memory wipes by Susan and Mary to cover their bungled attempts to woo him, have left Gil with severe brain damage, to the point he can't even write his own name.
- Laser-Guided Amnesia: A rare naturally occurring case. He pretty much never remembers Susan and Mary's names even though he knows their younger brother. Later, it was explained that the twins always wipe Gil's mind after their botched attempts to woo him.
- Oblivious to Love: Like you wouldn't believe...
- Prehensile Hair: As a member of the Johnny Saving Six.
- Pretty Boy: His looks constantly swoon Susan and Mary Test.
- Surfer Dude: Blonde, tanned, and frequently spouting surfer lingo like "Cha."
Eugene "Bling-Bling Boy" Hamilton
Eugene "Bling-Bling Boy" Hamilton
Voiced by: Lee TockarA rich kid who lives with his mother on a remote island. He is one of the main antagonists of the series yet is sometimes an anti hero. He is very rich and is obsessed with bling and shiny things as his nickname implies. His evil schemes are mostly attempts to flirt with Susan Test, who he has a one sided crush on.
- Abhorrent Admirer: He loves Susan Test but she wants nothing to do with him due to his repulsive appearance and overbearing personality. In one episode, Eugene was given a potion that made him stop loving Susan. He started loving her sister instead.
- Bodyguard Babes: Initially had some red-haired female designed androids that acted as his enforcers and they appeared infrequently through the first two seasons before they were never seen again for the rest of the series.
- Casanova Wannabe: Try as he might, the kid ain't a ladies man.
- Disappeared Dad: Never been seen or mentioned once, which suggests that his mother is either divorced or a widow.
- Ditzy Genius: His obsession with Susan and reliance on hired scientists can make you forget he's as much a super-genius as Susan and Mary.
- Friendly Enemy: When the super-villains capture Johnny, he admits Johnny is the only one who can stand his temper tantrums and goes to rescue him.
- Insistent Terminology: He hates being called by his real name, Eugene.
- As of now, he doesn't even bother correcting people anymore, suggesting he's accepted that no one will ever call him Bling-Bling Boy.
- Murder the Hypotenuse: Bling-Bling plotted to get rid of Gil so Susan would focus her attention on Bling-Bling Boy.
- Not-So-Harmless Villain: While his attacks normally revolve around getting Susan to be his girlfriend, when he snaps on occasion, he is extremely dangerous. Never underestimate a genius with infinite funds and a huge army at his disposal.
- Only Friend: Johnny may be his Arch-Enemy, but he also doubles as Eugene only friend. As it's pointed out above, Johnny is the only person who can stand him.
- Stalker with a Crush: Has a huge crush on Susan.
- Villain Decay: As the seasons went on, Eugene became less and less evil until he became the Token Evil Teammate.
Voiced by: Brittney Wilson (season 1, 5); Ashleigh Ball (season 2-4, 6)The next door neighbor of Johnny Test. She is a stubborn and gruff girl who has a love-hate relationship with Johnny. She owns a dog named Missy (later named Poochy), who Dukey has a crush on.
- Belligerent Sexual Tension: With Johnny. They are often rivals towards each other yet still show that they do admire each other.
- Distaff Counterpart: Her design and attitude is essentially a female Johnny, though she's presented as more mature.
- Expy: Of Susie Derkins.
Voiced by: Scott McNeilHe is Johnny Test's bully from school. He likes bullying Johnny a lot, making Johnny use his sister's experiments to try to stand up to him
- The Bully: He is basically a stereotypical bully.
- Expy: Of Moe.
- Hidden Depths: Apparently likes caring for roses.
- Real Men Wear Pink: Despite being a huge bully, he likes to take care of roses.
- Taken for Granite: His power as a member of the Johnny Saving Six.
- Would Hit a Girl: In the episode "Johnny Fu", he hits girls without a second thought.
Janet Nelson Jr.
Janet Nelson Jr.
Voiced by: Kathleen Barr
- Demoted to Extra: She was only seen for the past few episodes in Season 1 before she was demoted to a background character in later episodes.
Mr. Black and Mr. White
Mr. Black and Mr. White
Voiced by: Bill Mondy and Scott McNeil, respectivelyThey are two bumbling and washed up federal agents who are often seen together. They first appeared as villains in the second episode of the first season but have lost their edge and have become friends with the Test family. They are very incompetent at their job and rely on the Test family to get them out of any messes that they themselves caused. Their ultimate dream is to have a vacation in Fiji together.
- Ambiguously Bi: Mr. Black and Mr. White have a lot of blatant Ho Yay moments between them but they sometimes flirt with girls, which include some girls at a dog park.
- Ambiguously Human: Mr. Black and Mr. White are suggested in their first appearance that they are not humans, despite looking such. This is because they were able to shoot webs out of their wrists in their first appearance, which heavily implies them to be mutants of some sort. They even try to cover up their powers from the public. This is weird because they have never used their web slinging power in all their future appearances after their début.
- Catch Phrase: What's their favorite vacation spot? "We are going to Fiji! We are going to Fiji!"
- Cool Shades: They are never seen without their sunglasses on.
- Cross Dresser: Mr Black and Mr White once cross dressed as Susan and Mary Test for a Halloween Party but Susan and Mary dressed up as them
- Expy: They are similar to and are parodies of [[Men in Black Agent J and Agent K]].
- Heterosexual Life-Partners: Although the "Heterosexual" part drops dangerously low at times.
- Man Child: Both Mr. Black and Mr. White as they are both federal agents who appear to be in their early 30's yet the rely too much on the Test family to help them and are shown to be very irresponsible, Mr. Black in particular cries a lot like a baby in some episodes.
- The Men in Black: Kinda. They don't exactly do much good when they even appear. Usually they end up coming to Johnny, Dukey, Susan, and Mary for help.
- Real Men Wear Pink: They are both federal agents who look intimidating through their agent outfits and shades but they both love cooking and admitted that they once worked as salesmen who sold perfume.
- Salt and Pepper: Mr Black is white, Mr White is black.
- Sweet Tooth: Mr. Black as in one episode, his stomach shown to be digesting a lot of junk food.
- Theme Twin Naming: They are not brothers and they are not twins. Their first names are unknown and their last names don't rhyme but their last names are directly named after the colors of black and white.
- Those Two Guys: They are sometimes seen in episodes that don't involve them doing any missions as they try to protect a hotel under thereat of demolition because they appreciated its architecture and they also showed up at a Halloween party.
The GeneralHe is Mr. Black and Mr. White's boss and is the one in charge of maintaining national security in the areas around Porkbelly city. However, he can be sometimes bumbling.
- Cool Shades: He frequently wears sunglasses in his screen time. He is seen taking them off once.
Hank AnchormanHe is Porkbelly's primary anchorman and news reporter. He often reports Johnny's misadventures on television
- Kent Brockman News: Hank Anchorman tends to be somewhat eccentric when delivering news. This tripe is mostly how he runs his entire news operation.
Voiced by: Louis Chirillo (season 1-4); Bill Mondy (season 4-5)
- Card-Carrying Villain: He is well aware he was evil, though sometimes wishes he wasn
- Drink Order: He loves ice coffee.
- Heel–Face Turn: Brain Freezer seems to have dropped his evil ways since taking a level in handsomeness. In his next appearance, though, he was back to being evil to maintain the Status Quo.
Voiced by: James Arnold TaylorHe is one of the villains that Johnny Test has to deal with. He is obsessed with bees and beekeeping and has the tendency to exaggerate words like "be" by putting references to bees in it. Unlike other villains of the show, Doc Beebles did not want to cause harm to the world and its citizens as his only desire was for kids to eat healthier and exercise more, but he often go to highly extreme and unorthodox methods on order to achieve this goal.
- Anti-Villain: He does not desire world conquest or total annihilation. He only became a villain with good intentions as he just wanted kids to eat healthy and live long lives.
- Evil Sounds Deep: Via his bee suit when he has the helmet on.
- Heel–Face Turn: His only goal was just getting kids to eat healthier via his granola bars which Johnny eventually admitted didn't taste so bad. When Johnny attempt to do a improptu candy-giving holiday during the summer season failed for various reasons ( lack of a good mascot, being sued by the Easter Bunny etc), Beebles had the resources to do the holiday without any of the flaws (has a recognizable name, bees that could help him give away free granola bars and get kids to eat healthier in the bargain). Once he was able to achieve that, he no longer had a grudge against the Test siblings. And as a result, beyond a single mention in the third season finale, he never appeared again.
- Verbal Tic: Puts an emphasis on any instance of "be" that comes up when he talks.
- Well-Intentioned Extremist: In his first appearance, one of his main motives was to get kids to start eating healthier by stealing all of the sweets in town. What he doesn't seem to realize is that not only is he hurting the candy industry, his use of presumably genetically-modified bees makes him an eco-terrorist.
Voiced by: James Arnold TaylorAn alien from a planet whose species are vegetarians. He was initially the planets ruler who destroyed other planets to sustain his own until Johnny Test came along and caused him to be marooned on Earth. Since then, he has been obsessed with destroying Johnny but always fails to do so. He also has an unhealthy obsession with eating toast.
- Darth Vader Clone : Though he's more like Vader parody Dark Helmet, from Spaceballs. They have similar motivations and their actual appearances are similarly dorky looking (he even wears glasses similar to the ones Rick Moranis wears).
- Even Evil Has Loved Ones: His one main redeeming trait is that he does genuinely care about his daughter.
- Laser Blade: What do you expect? He's a parody of Darth Vader or maybe Dark Helmet.
- Trademark Favorite Food: TOAST! (Note that he only learns about toast later in the series.)
- Villain Decay: Justified as the result of living on Earth, as he can't replace his weapons which are from his own planet.
- Well-Intentioned Extremist: In his original appearance, he only destroys other planets to sustain his own planet (though apparently, this isn't really needed). After that, he's more in it for revenge.
Voiced by: Lee TockarHe is a selfish and greedy executive of a toy company who constantly disregards the happiness and well being of children
- Corrupt Corporate Executive: He's the head of a toy company named after him, but devotes all his time to finding ways to get rid of kids.
- Cut Lex Luthor a Check: Averted, sorta. His board of directors asked him if they'd go out of business if his plan succeeded. Turns out he'd already thought of that and programmed his robots to offer to 'babysit' the kids for free to keep their parents happy. Still, he's a brilliant enough man that his smarts could be better spent elsewhere.
- Devil in Plain Sight: His company is still afloat despite him being obviously psychotic and his company producing extremely dangerous toys with the intent to maim or 'get rid of' kids. Handwaved in that his legal team is apparently extremely good.
- Disproportionate Retribution: He built an army of extremely powerful robots to imprison kids in their own houses just for annoying him.
- Legion of Doom: He's the leader and founder of the 'Johnny Stopping Evil Force Five'.
- Would Hurt a Child: His entire character is this.
Voiced by: Maryke HendriskeShe is the alien daughter of Dark Vegan. She does not approve of her father's evil ways towards humans and her own people. She also has a crush on Johnny Test, who her father is obsessively trying to exterminate.
Voiced by: James Arnold Taylor
Zizrar, The Mole King
Zizrar, The Mole KingHe is the ruler of the mole people and lives underneath the Earth's crust. He desires to invade and conquer Earth but it often prevented from doing so because the eyes of his species are very sensitive to sunlight
- Ambiguously Gay: Zizrar and his entire race are all male and most of his minions wear biker leather. Also, Zizrar if flamboyant and is dressed up like a Camp Gay.
- Blinded by the Light: Zizrar's eyes, like those of his entire species, are very sensitive to light as any kind of light temporarily blinds him. Some examples include sunlight and lights from a flashing camera as Johnny used the latter to defeat Zizrar in their first encounter.
- Butt Monkey: In the snow day episode, Zizrar gets unintentionally beaten up by Johnny an some other people as his eyes got blinded by sunlight and he gets run over by snowboarders.
- Sissy Villain: He is the first villain of the series but his flamboyance and campy attitude are what make him fit as one.