Dukeson Leonard "Dukey" Test born June 10th ( in the pilot) is Johnny's pet dog and the deuteragonist of the show. Johnny got him as a birthday gift for his 11th birthday, asking his dad for a dog, and he chose Dukey. He was later mutated by Susan and Mary, Johnny's sisters, giving him the ability to speak and walk on two legs, as well as anything else a human can do, such as learn how to read, write, and self defense.
He is the voice of reason in many episodes but often winds up joining in Johnny's crazy schemes and adventures (usually because of steak or Johnny tempting him into it). Despite his devotion to Johnny, Dukey frequently expresses deep disdain towards Johnny's less intelligent antics, believing their situation as master and pet reversed. He usually gets more stressed than his master in dangerous situations and often gets worried whenever there's a risky test for Johnny from his sisters.
Characteristics
Despite his uniquely human abilities, however, Dukey is still a dog who can't deny his natural dog urges. His dog habits greatly annoy Johnny's sisters, to which Johnny takes deep delight. Usually, once per episode, when trouble arises, and there's no alternative, Dukey will say something along the lines of "Here's an idea: RUN!" Dukey has admitted that he's ticklish and can't resist a belly rub from Johnny.
Similar to Johnny's "Johnny X" form, Dukey also has a secret identity which, unlike his master, he does not particularly enjoy being called "Super Pooch" (although he also goes by "Super Dukey" and "X-Pooch"). He also likes to drink hot coffee. His favorite food is steak (all kinds of steak with porterhouse being his favorite).
Dukey also appears to have a strong memory of certain situations. For example, when Johnny attempts to catch a cold from Sissy Blakely to skip school but gets sent flying out of the house, Dukey says something along the lines of "Didn't get the cold?" even though he was waiting outside Sissy's home at the time.
Relationships
Johnny Test
Dukey and Johnny's relationship can be seen as similar to a boy and his dog but due to the fact that Dukey has the ability to speak, their relationship can be more easily described as brother-like. Dukey likes to hang out with Johnny a lot, but he's frequently annoyed by his shenanigans and often tries to talk him out of them by reminding him of the potential consequences of his actions, but Johnny usually doesn't listen to him.
Super Pooch/Super Dukey
Dukey goes as Super Pooch (sometimes known as Super Dukey) when Johnny goes as Johnny X. Dukey claims that he hates becoming Super Pooch in "The Revenge of Johnny X". When in "SuperPooch" form, Dukey can fly, and in the Third Season, has shapeshifting powers, the ability to sense what others are doing, and the ability to teleport. He has the power to fly as a sidekick (to Johnny) but usually crashes when landing. Also, in "The Destruction of Johnny X" Dukey claims that his Super Pooch costume gives him a mega-wedgie. Dukey isn't as enthusiastic about being a superhero as Johnny is, but he's forced to go along with his schemes on account of reverse psychology, guilt, and offerings of steak.
He is the first character out of the main 4 to speak
Johnny's 100th Episode shows that he was already intelligent before he was experimented on and just didn't know how to talk.
He also has an allergy (as said in the episode Li'l Johnny), but from what he didn't say although it speculated to be from large dust mites. quote "and they make people and dogs sneeze..."
Although the creators of the show have explained Dukey's background, it was eventually revealed to the audience in Johnny's 100th episode: Johnny wanted a dog for his 11th birthday gift, so instead of picking a small cute puppy as his dad named Hugh wanted, he chose the most lonely and friendly dog out of all, Dukey. Later, Susan and Mary gave him super intelligence as they hated his behavior as a normal dog.
In the same episode, his breed was revealed to be "Westminster Farting Mutt". (But it's obvious that he is actually a mixed breed since the pound owner supposedly called him that due to his poor nature and poor state when he was in the pound.)
Dukey usually beats Johnny in many sports video games such as skateboarding and dance games.
Super Pooch's name is later changed to just Super Dukey after season 1.
Super Pooch/Dukey's costume resembles that of classic Hanna-Barbera character Dynomutt, except with a reverse fin on the cowl to match Johnny X's look. (One reason the writers may have chosen to prefer "Super Dukey" as his superhero name could be the large "D" on the costume's chest piece, a holdover from its origin.)
Dukey has a spot on his butt he can't reach and loves it when someone scratches it.
As of Johnny Goes Nuts, Trevor Devall has replaced Louis Chirillo as the voice actor of Dukey. According to IMDB, Chirillo left so he could be with his wife in Brazil. However, sound bits of Chirillo may be used in conjunction with Devall's lines. Chirillo also briefly returned to the role in a bumper for Cartoon Network's 20th Birthday celebration.
He is one of the two characters to appear in all episodes, which the other is Johnny.
Sometimes Dukey disguises himself as a human, with clothes and costumes in some episodes. Since Sunshine Malibu Johnny, he already wears his blue swimming trunks to go swimming in a sort of swimming area. (on the same episode it reveals that Dukey made a whale fall in love with her because once he saved her life by pushing her back in the water).
He holds the world record for "eating the most BBQ rocks under a specific amount of time" (Johnny's World Record).
In Johnny Vets Dukey, Dukey is afraid to go to the vet because of the pointy needles, the coffee is cold and the thermometer supposed to go under the tongue.
Hugh and Lila found out Dukey could talk in Johnny's New BFF before having their memories erased.
Susan and Mary programmed a part of his animal instinct for being Chinese (according to him knowing kung-fu and Chinese).
In a few episodes, he is shown eating chocolate, which in reality, could kill him as it is considered poisonous to dogs.
Dukey was an NPC in Fusionfall. He and Johnny were at the Nuclear Power Plant which they thought was a skate park. Interestingly, there were two skateparks in the downtown area of the game, one of which (like the Nuclear Power Plant) was an Infected Zone. He was also a shop vendor.
Unfortunately, due to copyright, Johnny and Dukey will not appear in Fusionfall Legacy.
Dukey may have been named after the Green Day album titled "Dookie", due to the writer being a huge Green Day fan.
Quotes
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"Didn't see that coming."
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~ Dukey
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"Say what?"
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~ Dukey
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"Okay, we can FREAK OUT NOW!"
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~ Dukey
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"Karma always gets you."
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~ Dukey
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"What's more important is staying alive."
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~ Dukey
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"I'm about to freak. AAAAAAAAAAAAH!"
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~ Dukey
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"ARE YOU NUTS"
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~ Dukey
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"I'm patience for bit silent dog, Johnny"
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~ Dukey
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“Johnny it’s beautiful outside and you need to go to school!”
