The Calvin and Hobbes Wiki
Zog King

The Zog King was king of the Zogs, on Planet Zog.

Rather unlike the zog guard, the king's eyes are on top of short stalks above its mouth. It has at least two tentacles protruding from its body, but it is unknown whether they stand in for arms, legs, or something else entirely.

His real-life counterpart was Calvin's doctor.