Goku has just finished his training with Uub and has headed home. When he arrives, he is greeted by Goten, who immediatley tells his father about his recent power increase on becoming a super saiyan 2, Goku is heavily shocked by this because when he had left goten didn't seem interested in training whatsoever, goten realizes what his father must be confused about and tells him when his father said that himself and trunks would be the ones to guide uub after he and vegeta are gone so him and trunks trained until harder then ever until they achieved super saiyan 3. Goku then tells goten to turn into a super saiyan 2, goten then does as said goku then senses his power level and is shocked to learn he's stronger then, goku embarrassed say's, "uhhh... keep training your becoming very powerful."