How to Turn into Super Saiyan 2 in Buu's Fury

Begin the third chapter of the game, "World Tournament." Follow Goten east into the forest to train for the tournament. Defeat any enemies you encounter along the way with punches or energy attacks. Defeat Goten in training by using the d-pad to dodge rocks and fight his Super Saiyan form.

Travel north and then east and speak with Bulma and tell her you want to travel to the tournament.

Speak with a woman sitting behind a desk to enter the tournament. When a character tests your punching strength, press "A" as the arrow crosses into the green area of the meter. Your playable characters are now entered into the tournament.

Defeat all opponents in the tournament by using a combination of melee and energy attacks. You will first play as Trunks, then as Gohan and then as Videl, who will be knocked out despite your best efforts. After the tournament, Goku is tasked with obtaining a "Senzu Bean" from Kami's Lookout to heal Videl. Travel south and use the "World Map Circle" to fly the the west side of the world map. Land on the Star to enter Kami's Lookout.

Use the flight pad to fly to a small island where the characters Korin and Yajirobe are located. Walk counter-clockwise around Yajirobe three times and then speak to him to receive the Senzu Bean. Return to the tournament island by using the flight pad to return to the World Map Circle and then fly back to the tournament.

Walk to the entrance to the tournament. Give the Senzu Bean to Gohan who will use it to heal Videl. Enter the tournament to begin the battle. Goku automatically activates his Super Saiyan ability and brings it level two. This unlocks it for use later in the game.