With the death of Superboy during the Infinite Crisis limited series, it has not yet been revealed what has happened to Krypto and who cares for him in the current DC Universe, One Year Later. He was originally supposed to return in Superman #659, but it has been held up for unknown reasons. Shelby also appeared as Clark Kent's farm dog in the four-part comic Superman For All Seasons. This name was used because Superman For All Seasons's artist Tim Sale has a dog named Shelby. Some time later, Superman left Krypto in Superboy's care, saying that Smallville's open spaces were a better place for the dog, and that Superboy could use a friend (as shown in the 2003 Teen Titans #7). Their relationship had a shaky start, not helped by Krypto getting Superboy in trouble with the superheroine Starfire for destroying her alien garden.

Superman • Supergirl ( Super-Girl • Kara Zor-El • Matrix/Linda Danvers • Cir-El) • Superboy • Steel ( John Henry Irons • Natasha Irons) • Eradicator

In the Justice League Unlimited episode For the Man Who Has Everything Krypto appears as a pet of Superman's imagined son Van-El. This Krypto is depicted as having no powers (as he is still on Krypton) but otherwise looks similar to other versions of Krypto but without a costume. Krypto has yet to appear in an episode of Smallville. However, in episode 4-14 ("Krypto") of the 2000s television series Smallville, the show introduced a Golden Retriever with strength like Clark Kent's. This dog had originated from an experiment with Kryptonite. Clark Kent kept the dog, and considered naming him "Krypto" (Lois asked why that name, Clark responded it was because of his cryptic origins). Lois disliked the name telling him, "You can name your next dog Krypto". and he eventually named him "Shelby," after one of Martha's old dogs. Even though he was a male dog, Clark felt it was a better name over Lois' choice: "Clarkie." The third and more familiar version of Krypto was introduced in the early 2000s Superman comics, as a dog from a false, idealized Krypton (that coincidentally resembled the pre-Crisis Krypton) that was created as a trap by one of Superman's enemies; Superman was able to defeat the trap, and when he returned to Earth, Krypto followed him. In Superboy #126 (Jan 1966) "Krypto's Family Tree", Krypto's father's name was given as Zypto, his grandfather as Nypto and his great-grandfather as Vypto. He was later acquired by the modern Superboy, Kon-El; however, this version of Krypto was an ordinary Earth dog with no superpowers, and the dog and Kon-El didn't get along at all. The dog was eventually dropped from the series, remaining in Hawaii when Superboy returned to Project Cadmus.

In the final (noncanonical) pre-Crisis Superman story, Alan Moore's Whatever Happened To The Man of Tomorrow?, Krypto sacrificed his life to save Superman by biting the throat out of the Kryptonite Man. The villain died, but Krypto was irradiated by him and died as well.His uniform has become nearly as famous as Superman himself. Consisting of a blue bodysuit emblazoned with a red and yellow 'S' on the front and topped off with a heroic looking red cape, this guy looks the part of the quintessential superhero. Plus, the sleek quality of his super suit fits easily under everyday office wear, as was demonstrated by Clark Kent, so he's ready at a moments notice to be Superman! Face it. Your dog is more of a party animal than you'll ever be. If it were up to him, he'd be drinking punch straight from the bowl within the first five minutes of the party, followed by a run across the dance floor to chase that person dressed like a cat. That's why you shouldn't deny your pet the pleasure of dressing up for the holiday, just like his master! You'll find fun dog Halloween costumes here! The second modern Krypto was a small white pet dog, rescued, and later named by Bibbo Bibbowski. Originally, Bibbo had wanted to name the dog Krypton after Superman's home planet. However, the engraver of the dog tag (knowing that Bibbo had recently won the lottery) intentionally dropped the letter "n" ("Six letters or less for 1 dollar"), so he was trying to extort more money from Bibbo; an angry Bibbo refused to comply and renamed the dog as Krypto. Soon after, the dog found two people who had been trapped in a bomb shelter for a month following Superman's fight with Doomsday. They were barely alive but would make it.

World Without a Superman (First Appearance of Bibbo's Krypto) • Return to Krypton (First Modern-age Appearance of Kryptonian Krypto) • " Superman: Our Worlds at War" • Teen Titans #7 • Atlas

Dog Halloween Costumes

In DC One Million, Krypto is a clone of the original and leader of the Legion of Executive Familiars in the 251st century. His Kryptonian powers have been increased to the ninth power.

Krypto had the distinction of belonging to not one but two organizations of super-animals; the 30th century Legion of Super-Pets, and the Space Canine Patrol Agency. Krypto was drawn as a white dog of generic pedigree. When fighting crime, he usually wore a gold collar, a miniature facsimile of the famed Superman-"S" symbol for a dog tag, and a dog-sized version of Superman's cape. Following the 1985-1986 Crisis on Infinite Earths limited series, Superman's history was extensively rewritten, initially eliminating all other survivors of Krypton in the revised version of his origin, including Krypto, so as to once again make the premise that Superman was truly the "Last Son of Krypton" a valid one. This rewrite has in fact been dubbed by some as "krypto-revisionism".Like all descendants of Krypton under a yellow sun and lower gravity environment (vs. Krypton's red sun and heavy gravity), Krypto possessed the same powers and abilities as his master, although his physical abilities were proportionate to his smaller size and species, similar to an ordinary dog vs. a human. Krypto also had super-canine intelligence (approximately human level, though with his canine traits and interests still present); the comics expressed this via the use of thought balloons indicating what Krypto was thinking. Superman X • Willigig • Superstar • Superego • Supercilia • Titano • Kan • Layna • Superman of Xudar