Official versions of Tekken Tag Tournament 2 (TTT2) were never released for the PlayStation Portable (PSP). To play "Tekken Tag 2" on the PPSSPP emulator, you must use a modified version of Tekken 6.
However, a highly active modding community has created "Tekken Tag Tournament 2" experiences for the PPSSPP emulator by heavily modifying The Best "Tekken Tag 2" PPSSPP Experience tekken tag tournament 2 ppsspp isoroms best
The appeal of Tekken Tag Tournament 2 on a mobile or handheld emulator lies in its staggering roster. With over 50 characters, it represents a "greatest hits" collection of the franchise. Players can pair legendary fighters like Jin Kazama and Kazuya Mishima, or experiment with more niche combinations to discover unique Tag Throws and Tag Assaults. This strategic layer—managing two health bars and timing character swaps—transforms the traditional 1v1 formula into a high-stakes chess match of reflexes. Official versions of Tekken Tag Tournament 2 (TTT2)
If you want to avoid the gray market entirely but still want the mobile experience: Enable "Display On-screen Touch Controls" Map L and
(with file sizes up to 17GB), the "ISO ROMs" found for PPSSPP are actually modified versions of the 800MB PSP Tekken 6. Digital Foundry Face-Off: Tekken Tag Tournament 2 | Digital Foundry