For those asking, TTT2 is available for PSP via high-quality total conversion mods of Tekken 6. Updated textures, TTT2 UI/HUD, and Tag-team mechanics. Requirements: PPSSPP Emulator or a CFW-enabled PSP.
However, these mods are unstable. Expect long loading times, crashes during special throws, and audio desyncs. They are the true TTT2 experience.