Here I present a model sheet of King Barbo, a character that appeared very briefly in the season two He-Man episode "The Shadow of Skeletor". The design of this character would later show up seventeen episodes later as King Tamusk in "The Time Wheel". To this day I find it surprising that King Tamusk's design is based on King Barbo's. In other words, due to the dominant presence of King Tamusk in the later episode I would think that it was he that was designed first. Regardless, King Barbo's excellent character design was reused wisely, and there is no doubt that King Tamusk made more of an impact on the series than the former character!
(click on the image to see it at full-size)