He then attends the world martial arts tournament where he meets his father Goku for the first time. At the tournament, Goten easily defeats his opponent and advances to the finals where he fights his best friend Trunks. Trunks overwhelmed Goten, which forces to transform into a super saiyan and brake out trunk's clutches. Trunks challenges Goten by fighting him using one arm but Goten overwhelmed him and also forcing him to go super saiyan. Goten loses to trunks after the latter tricks him knocking him out of the ring.