Dragon Ball Z - Budokai Tenkaichi 2 - Platform: Wii

Play as Bardock:
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Unlock the Bardock The Father Of Goku scenario in Story mode. 

Play as Burter:
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Defeat Burter in Frieza Saga Story mode to unlock him. 

Play as Cell (first form):
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Defeat Cell with Piccolo in Android Saga Story mode to unlock him. 

Play as Cell (Perfect form):
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Successfully complete Android Saga Story mode to unlock Cell (Perfect form). 

Play as Cell (second form):
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Defeat Cell two times in Android Saga Story mode to unlock Cell (second form). 

Play as Cell Junior:
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Defeat Cell Junior with Teen Gohan (Super Saiyan 2) in Android Saga Story mode 
to unlock him. 

Play as Dabura:
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Defeat Dabura with Gohan (Super Saiyan 2) in Majin Buu Saga Story mode to unlock 
him. 

Play as Dr. Gero (Android 20):
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Defeat Dr. Gero with Krillin (Kuririn) in Android Saga Story mode to unlock him. 

Play as Frieza (Second Form):
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Defeat Frieza (Second Form) in Frieza Saga Story mode to unlock him. 

Play as Frieza (Third Form):
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Defeat Frieza (Third Form) two times in Frieza Saga Story mode to unlock him. 

Play as Frieza (Final Form):
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Defeat Frieza (Final Form) three times in Frieza Saga Story mode to unlock him. 

Play as Ginyu:
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Defeat Ginyu in Frieza Saga Story mode two times to unlock him. 

Play as Gogeta (Super Saiyan 4):
--------------------------------
Successfully complete the Shadow Dragon Saga Story mode to unlock Gogeta (Super 
Saiyan 4). 

Play as Gogeta (Super Saiyan):
------------------------------
Successfully complete the Fusion Reborn Story mode to unlock Gogeta (Super 
Saiyan). 

Play as Gohan (Great Saiyaman):
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Unlock Majin Buu Saga in Story mode to unlock Gohan (Great Saiyaman). 

Play as Gohan (Super Saiyan):
-----------------------------
Reach the part where you fight Android 17 and 18 in History Of Trunks Story 
mode. 

Play as Gohan (Super Saiyan 2):
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Defeat Dabura with Gohan (Super Saiyan 2) in Majin Buu Saga Story mode to unlock 
him. 

Play as Goku (Super Saiyan):
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Reach the part where you fight Frieza (Final Form) the third time in Frieza Saga 
Story mode. 

Play as Goku (Super Saiyan 2):
------------------------------
Defeat Majin Vegeta in Majin Buu Saga Story mode to unlock Goku (Super Saiyan 
2). 

Play as Goku (Super Saiyan 3):
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Defeat Majin Buu (Good) in Majin Buu Saga Story mode to unlock Goku (Super 
Saiyan 3). 

Play as Goku (Super Saiyan 4):
------------------------------
Reach the part where you fight Yi Shenlong (Omega Shenron) in Shadow Dragon Saga 
Story mode to unlock Goku (Super Saiyan 4). 

Play as Goten (Super Saiyan):
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Unlock Majin Buu Saga in Story mode to unlock Goten (Super Saiyan). 

Play as Gotenks:
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Defeat Super Buu the first time in Majin Buu Saga Story mode to unlock Gotenks. 

Play as Gotenks (Super Saiyan):
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Defeat Super Buu with Gotenks (Super Saiyan 3) in Majin Buu Saga Story mode to 
unlock Gotenks (Super Saiyan).