Son Goku

Goku is the main protagonist of the Dragon Ball series, he appeared in the season 5 episode Kid Goku VS Gon where he fought against Gon Freecs from Hunter X Hunter.

Trivia
Goku is the 10th Dragon Ball character to appear after Trunks, Broly, Vegeta, Goku Black, Krillin, Yamcha, Tien Shinhan, Gohan and Frieza