Ok, so there's the kid at Smallville High who isn't just stinking rich, he's snooty about it too. After this Ronnie Vayle (Ronnie Vayle-Ron-Ron-Ronnie Vayle) almost gets into accident showing off his new roadster, Clark decides to teach him a lesson... by selling him his dog. Hey Krypto, come here boy, this paint can't hurt you!
But spending time with Ronnie allows Krypto to see another side of him, and figuring the kid just doesn't understand he's going about making friends the wrong way, he flies to his trophy stash in space and comes back with a crystal that allows you to hear things from far away. That way, Ronnie can hear what people REALLY think of him and are just too nice to tell him to his face.
Around this time, in Superman #179, the story of that sentient piece of narrating Kryptonite continues, this time turning it into Gold K, which strips Kryptonians of theirs powers permanently, the prize item in Superman's trophy collection, the bottled city of Kandor, is witness to the elemental chance and two of its denizens make an exit to project the stone into the Phantom Zone before Superman shows up at the Fortress and loses all his powers. They manage it, but lose their powers, and lest they pollute the Kandorian gene pool by having kids with no power potential, they choose to live their diminutive lives on Earth. Among the things they do to feel relevant is hitch a ride on Krypto's back to stop one of Luthor's jail break plots.