* Completing Story Mode: Beating the main story will unlock new characters.
* Winning specific battles: Defeating certain opponents in particular modes (like Challenge Mode) will unlock them.
* Collecting Dragon Balls: Gathering all seven Dragon Balls unlocks a special character.
* Reaching certain milestones: Sometimes, unlocking characters is tied to completing a certain number of battles or reaching a specific level.
* Using special items: In some cases, rare items or unlock codes can be used to gain access to new characters.
To be more specific:
* The exact requirements to unlock each character are not universal across different versions of the game. The specific conditions may vary depending on which platform (PS2, PSP, etc.) or region (Japanese, American, etc.) you are playing on.
* There is no one-size-fits-all answer. To find out the specifics for your version of the game, you will need to consult a walkthrough or character unlock guide specific to that version. You can usually find these resources online.
General Tips:
* Play through the main story mode: This is the easiest way to unlock a large number of characters.
* Experiment with different game modes: Challenge Mode, Survival Mode, and other modes can have specific unlock requirements.
* Pay attention to in-game hints: The game will sometimes give you clues about how to unlock characters.
* Search online for guides: There are many resources available online that detail character unlock requirements for different versions of the game.
Good luck unlocking all the characters in Dragon Ball Z: Taiketsu!