Dragon Ball Zero

Years after the conflicts with the time breakers, The z fighters and co later settled down.

Goku bored with the peace and sanity that comes with a normal life decides to ask vegeta to spar for old time's sake but vegeta declines because he deems such a act to be pointless and childish.

Goku thought to himself that maybe broly would be fine to spar with until he hears a childish voice calling for him from afar.

He recognizes the child as goku jr and asks how powerful the boy is, To which goku jr responds stronger than average humans but weaker than most people you have fought.

Goku then provides to ask goku jr about training but raditz interrupts him before he could finish, Saying heard you needed someone to spar with brother.

Goku accepts raditz's offer but before goku could get into his stance, a bunch of snakes came out of ground and attempted to grab him but goku blitzed them without any difficulty and appeared behind his brother without him even noticing due to his immense speed.

Raditz grappled goku's arm from behind and threw him into the dirt to which goku responded with by leg sweeping his brother to the ground and then goku gets up and kicks his brother in the stomach.

Raditz then passes out, realizing he gone far to hard on his older brother, He gives him a senzu bean and apologizes for going to hard on him. Radiz responded by saying you should treat your family more kindly kakarot.

Raditz tells goku that he has to deal with his wife to which goku responds by saying where did you learn that snake technique, Raditz states that it was his wife princess snake who taught him that move and raditz elaborates via saying she's even stronger than me.

Goku bids farewell to his brother before heading back home to chi-chi.

Chi-chi states where have you been all this time?

Goku responds via saying he was with his brother.

Chi-chi said which brother to which goku responds via saying raditz.