If you want to unlock characters without cheats, you must beat repeatedly with specific conditions. Here is the official unlock tree:
Complete Chapter 7 with (don't let cities be destroyed). Complete all 7 chapters of Another Road. (Final Form) Complete Mission 2 in Chapter 4. Finish the entire Story Mode once. Important Tips dragon ball z shin budokai 2 ppsspp unlock all characters
Achieve Ending A by preventing enemies from destroying any city in the final chapter. (Fused with Kami) Defeat him on the alternate path of Chapter 3. Super Buu (Gohan Abs.) Complete Level 3 in Chapter 7. Super Buu (Gotenks Abs.) Complete Level 2 in Chapter 7. Future Gohan (SSJ) Complete Chapter 5. Complete all 7 story chapters. Option 2: Use 100% Save Data (PPSSPP) If you want to unlock characters without cheats,
Ultimate Guide: Dragon Ball Z: Shin Budokai 2 PPSSPP Unlock All Characters (Final Form) Complete Mission 2 in Chapter 4
For the vast majority of PPSSPP users, the most efficient way to is by importing a completed Save Data file. This bypasses the need to play through hours of story mode instantly unlocking every character, stage, and costume.