after goku and his friends met up, they all saw each other much, much older. After chatting, goku decided to sign up for the tournament. While gokus doing that, his friends are just waiting outside

Oolong: wow……five years…..

Puar: yeah! He has gotten so big!

Roshi:….

Launch: I can’t believe he used to be that cute little kid we knew!

Bulma: yeah…and it’s unbelievable! Who would’ve thought goku would’ve been so tall and handsome?!