King Nikochan's Servant
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
King Nikochan's Servant (ニコチャン 大王 の 家来, Nikochan Daiō no Kerai}; Literally meaning "Nikochan Great King's Servant") is a loyal helpful servant of King Nikochan.
Though Nikochan's Servant was a major recurring character in Dr. Slump, he was unnamed. He appeared to be much smarter than Nikochan, but always followed his master's orders.