Question: how to unlock all characters in dragon ball z budokai tenkaichi 3?
Answer: Android #08 - Beat "Kindhearted Android" in "What If Saga"
Arale - Beat "Dream Match" in "What If Saga"
Babidi - Beat "Farewell to The Proud Warrior" in "Majin Buu Saga"
Cyborg General Tao - Win in the Otherworld Tournament (on level two)