Is Krypto in danger of becoming a simple storytelling device rather than a character? If he is, it's Superboy's fault for sliding him on stage at the eleventh hour as part of some reveal or other. And it happens not in one, but TWO stories in Superboy #116. In the top story, "Superboy, King of the Wolf-Pack", the Teen of Steel falls in with wolves
To unpack (pun intended) this as efficiently as I can, as we learn the truth from Superboy bragging to the police chief, these guys came to Earth fleeing an oppressive regime, and to hide them from enemy eyes, he built a Body-transformation ray-tube that could turn them, yes, into animals. By acting crazy and leading his pack into inhabited areas, Superboy hoped to inspire "vigilantes" to try and kill the wolves, so he'd have an excuse to put them on their ship and send them to a new world. And Krypto's role in this little play?
In the issue's third story, "The Ordeal of Chief Parker", sees Superboy turn against the police chief and call him out on his every mistake, many of which he manufactures. He makes him doubt himself to the point where he writes his resignation.
Oh yeah, Krypto also appeared in Jimmy Olsen #80 that same month, in a story in which Jimmy visits Bizarro World as one of their own. So it's Bizarro Krypto.