Restart the app, and you should see "Load Successful" on the main menu. For Original PSP Hardware
Master Your Game: The Ultimate Guide to Dragon Ball Z: Tenkaichi Tag Team Save Data
Connect your PSP to your computer via USB or insert your Pro Duo Memory Stick into a card reader. Navigate to the PSP folder, then the SAVEDATA folder.
The gold standard for PSP saves. They usually have "System Data" files that have everything unlocked.
Access all 70+ characters (including Vegito, Broly, and SSJ4 Goku) without playing through the lengthy Dragon Walker mode.
Depending on whether you are playing on original hardware or an emulator, the process varies slightly. For PPSSPP (PC, Android, and iOS)