From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Zoonama's Japanese name is a pun on the word Namazu, or Catfish in English.
Zoonama appeared in "Trunks, the Bride". He terrorized the people of a small village by telling them that if they did not do as he commanded, he would create earthquakes. When he requested a bride to marry, Trunks Brief substituted for Lene and dressed up as a woman. He then went with Zoonama, but was secretly followed by Son Goku, Son Pan, and Domas (Lene's fiance). In the end, they found out that Zoonama could predict earthquakes and volcanic eruptions thanks to the movements of his mustaches, but was not able to actually create them.
Zoonama appeared in Dragon Ball GT: Transformation.