If you don't trust pre-made files, you can make your own using + Cheat Engine :
Save data is stored on the Memory Stick Duo at: PSP/SAVEDATA/ULUS10529001/ (US version) PSP/SAVEDATA/ULES01439/ (EU version) PSP/SAVEDATA/ULJM05777/ (JP version) dragon ball z tenkaichi tag team save data hot
For those interested in expanded rosters, there are also "Tenkaichi 4" style for the PSP version that include characters from Dragon Ball Super , though these often require specific modded ISOs to function correctly. Dragon Ball Z: Tenkaichi Tag Team – Save Games - GameFAQs If you don't trust pre-made files, you can