From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Shusugoro (スー小五郎, Sūkogorō) is the son of Sugoro.
Shusugoro appeared in "The Game After Life". He and his father were somehow trapped in Sugoroku Space when their ship was destroyed. They then cheated in a board game in order to win by Shusugoro assuming the shape of a die. Son Goku saved him and his father and the two of them later helped Goku regrow his tail. His name was only mentioned in episode credits and the Dragon Ball: Daizenshū.