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They say that dog is man’s best friend before they take a dump on your living room floor. But in the case of Krypto, he is Superboy’s childhood pet from before Krypton exploded. First seen in Adventure Comics 210, we will take a look at why DC struck gold with this fan-favorite canine. You know a character is popular when it is given its own television series. Despite starting off as a sidekick white pet that could chew through metal, time has shown that personifying a cute dog always pays off.
Who is Krypto?
Depicted originally as a generic white dog with long ears, he first hit comic pages in 1955 as Superboy’s long-lost pet. Later depictions have him closer to a Parson Russell Terrier, but the reality is that Krypto is not a specific breed of dog. According to his origin comic (affiliate link) Adventure Comics 210, he seemingly has all the same powers as Superboy. This includes super-strength, invulnerability to bullets, x-ray vision, and the ability to fly.
Krypto, just like Superboy and Supergirl, came from the planet Krypton. Similar to how primates were used as space test subjects during the time period the comic was published, Krypto was a test subject in a rocket. For whatever reason, the test ship never made it back to Krypton. It is suggested that maybe an asteroid hit it or something. It wandered lost in space until it finally found its way to Earth.
Most people who read about Krypto end up wanting to see what happens next in his earliest adventures. Do me a favor and check out (affiliate link) Adventure Comics 210 and see how DC turned a test‑rocket dog into one of the most beloved characters in superhero history. It’s the kind of story that makes collectors grin every time they flip the cover. Don’t worry, you don’t need to hunt down a rare collector’s copy, because modern reprints make it easy. Just one more thing: it’s the kind of comic that reminds you why DC’s golden age still matters.
In the original comic origin story, Superboy tries his best to undo any damage caused by Krypto. The Superdog causes nothing but chaos and headaches by acting like a regular dog, but at a different strength scale. As the dog rips apart an airplane wing and the beam of a bridge, Superboy scrambles to make sure no one is hurt. The problem solves itself when Krypto flies off into outer space, treating it like his own backyard playground.
Krypto’s Television Show
Animals are entertainment gold for children. Kids cannot relate to adult problems at all, nor can they be exposed to sexuality or violence. This dwindles humor down to ambiguous animated characters for entertainment. Examples are the slinky dog in Toy Story and the candelabra Lumiere in Beauty and the Beast. So basing a television series off of a flying talking dog makes sense. (Worked out for Underdog!)
Astonishingly, Krypto’s origin story from his kids television show Krypto the Superdog is virtually identical to the comic origin. Sent into space inside a test rocket as a puppy, damage to the ship causes a change of plans. The puppy’s vessel is redirected to Earth. The plot skews from the comic when a lonely boy named Kevin adopts the dog and they have adventures together. A convenient communicator earpiece lets the boy understand the dog.
The idea of secretly having your childhood pet being a superhero you can talk to is a fantasy. It is actually a brilliant premise that extends the longevity of the series. Or at least you would think so, since the series only lasted two seasons. The show is attributed to Paul Dini, the man behind Batman: The Animated Series and other DC animated entertainment. The style, though, is more exaggerated and targeted toward young children. It carries the art approach of Yogi Bear, or The Jetsons.
Krypto and Supergirl
Although originally associated with Superboy, the “dog of steel” also happened to accompany Supergirl as well. The comic story in mind is Supergirl: The Woman of Tomorrow, and is associated with the 2026 Supergirl movie. In this circumstance, Krypto fails with his heroism due to a red sun planet (that removes his powers). A naive attack toward Krem of the Yellow Hills causes the dog to be hit with poison arrows. The plot revolves around this point (seemingly) in both the comic and movie versions. It’s a surprisingly grim turn for a character who once fetched meteors for fun.
Although in this case Krypto was with Supergirl, the Superdog is more associated with Superboy. In the original comics, Supergirl and Streaky the Supercat were associated with each other. This is because of the cliche associations in the earlier comics of boys having dogs and girls having cats. Still, Krypto’s crossover moments with Supergirl prove that even a flying dog can transcend cliches when the story calls for it.
Krypto’s inclusion alongside Supergirl also serves as a clever emotional shortcut for the audience. A dog in distress is universal shorthand for sympathy, and DC knows it. By giving Supergirl a wounded companion, the story instantly humanizes her rage and grief without needing a monologue. It’s a narrative cheat code that works every time: hurt the dog, and everyone suddenly cares. Yet beneath that manipulation lies something sincere. Krypto’s loyalty doesn’t depend on gendered tropes or heroic hierarchy. Whether he’s guarding Superboy’s bicycle or bleeding out beside Supergirl, he remains the same steadfast creature who reminds readers that even gods need a friend who doesn’t talk back. (Although endless barking is something dog-lovers often forget about.)
The problem with Krypto
Although having a loyal flying dog that can snap the neck of a dinosaur may seem beneficial, it has some drawbacks. As seen in the original origin comic, dogs are as dumb as doornails. We are talking about a creature that eats used menstrual products out of trash cans. Imagine having to deal with one that treats skyscrapers like fire hydrants as it flies above them. It isn’t like you can punish it by bopping its nose with a rolled-up newspaper. Even hitting it in the face with a sledgehammer would just break the handle. Even Cesar Millan couldn’t help you discipline Krypto.
Krypto also doesn’t understand subtlety. If you tell a normal dog to “go get the stick,” it trots off and brings back a branch. If you tell Krypto to do the same he might return with a telephone pole, or a nuclear missile. He means well, but his version of fetch usually ends with a crater and confused politicians. You can’t even yell at him, because he’ll tilt his head and wag his tail like he didn’t just cause a multi‑state blackout.
And don’t forget the shedding. A regular dog leaves fur on your couch. Krypto leaves fur that can survive atmospheric re‑entry. One loose hair could puncture a tank, slice through a battleship, or ruin your Roomba permanently.
So yes, Krypto is adorable, loyal, and capable of ripping a tank in half like it’s a chew toy. But owning him is like owning a nuclear warhead with separation anxiety. You love him, but you also pray he never gets excited near anything important. Like your house, your car, or the East Coast.