If you are facing the NVRAM error, the solution usually involves clearing the memory and forcing the game to write a fresh set of default data. This is known as a "Factory Reset" or "NVRAM Clear."

Tekken Tag on PS2 stores configuration data in memory cards, not a discrete NVRAM file. However, to reset:

Every time Leo beat Arcade Mode, the NVRAM—the non-volatile memory that held high scores and unlockables—would corrupt. The game would freeze on the "Congratulations" screen, and the next morning, all records were wiped. The cabinet had amnesia.

Warning: Incorrect edits can permanently brick your NVRAM image. Always work on a backup.