Many modders have created Tekken Tag Tournament 2 HD texture packs.
Now, your Tekken 6 ISO will have TTT2 character portraits, UI, and stage textures. tekken tag tournament 2 ppsspp file download link
If you specifically want the tag mechanic (switching characters mid-combo), the PSP hardware cannot natively handle two character models simultaneously in the Tekken 6 engine without lag. However, these mods come closest: Many modders have created Tekken Tag Tournament 2
Solution: In PPSSPP settings > Tools > Create PSP Folder Structure. Ensure your device has write permissions. Now, your Tekken 6 ISO will have TTT2
Solution: Reduce Rendering Resolution to 2x PSP. Turn off "Post-Processing Shader." Enable "Force Real Clock Sync."
Tekken Tag Tournament 2 (TTT2) is widely considered one of the greatest fighting games ever made. With its massive 59-character roster, deep tag mechanics, and the return of stage transitions, it remains a fan favorite. Naturally, many gamers want to experience this masterpiece on the go using the PPSSPP emulator (the popular PlayStation Portable emulator for Android, PC, iOS, and Mac).
However, there is a massive misconception online that needs to be cleared up before you go looking for files.