If you have found a reliable Yu Gi Oh Tag Force 6 Save Data Patched file (usually in .zip or .rar format), follow these instructions.

Because Kaito was playing a fan-translated ISO on a modified handheld, his system couldn't "see" the older games. His progress was stalled, and his favorite synchro monsters were locked behind a digital barrier.

: Navigate to your PPSSPP directory, then PSP > SAVEDATA .