Dragon Ball Z: Budokai

• 1). Play through Story Mode as Gohan and defeat Cell to unlock the character Teen Gohan.
  
  
• 2). Play as Teen Gohan and play through the game, building up your Ki meter to level 4. Press the "Punch," "Kick" and "Guard" buttons at the same time to transform into a Super Saiyan.
  
  
• 3). Build up your Ki Meter to level 5, and press the "Punch," "Kick" and "Guard" buttons at the same time to transform into a Level 2 Super Saiyan.
  
  

Dragon Ball Z: Budokai 2

• 1). Play through Dragon Mode as either Goku or Vegeta.
  
  
• 2). Fight and defeat Cell while playing as Goku to get his Super Saiyan Level 2 Capsule, which allows him to transform into that level of Super Saiyan.
  
  
• 3). Fight and defeat Super Buu while playing as Vegeta to get his Super Saiyan Level 2 Capsule.
  
  
• 4). Play through Dragon Mode as Teen Gohan, Trunks or Vegeta and collect all seven Dragon Balls to summon the dragon Shenlong. When he offers you a choice of wishes, choose to receive a Breakthrough Capsule. Repeat for each character to get Breakthrough Capsules for each of them.
  
  
• 5). Play as one of these characters and build up your Ki meter to 3. Press the "Punch," "Kick" and "Guard" buttons to transform into a Super Saiyan. Then build up your Ki to 4 and press the "Punch," "Kick" and "Guard" buttons again to transform into Super Saiyan Level 2.
  
  

Dragon Ball Z: Budokai 3

• 1). Play through Dragon Universe mode as Goku, Gohan, Teen Gohan or Vegeta. During the course of the game your character will receive the ability to turn into a Level 2 Super Saiyan.
  
  
• 2). Play through Dragon Universe mode as Trunks and complete stages. After completing a stage, play the missions associated with that stage to collect stars.
  
  
• 3). Go to the Shop on the menu screen to spend your Stars to buy Trunks' Level 2 Super Saiyan capsule.
  
  
• 4). Play as one of the above characters and build your Ki up to level 4. Press the "Punch," "Kick" and "Guard" buttons to transform into a Super Saiyan. Then build your Ki up to level 5 and press the "Punch," "Kick" and "Guard" buttons again to transform into a Level 2 Super Saiyan.