There is no official version of for the PlayStation Portable (PSP). Any "ISO" or "ROM" files claiming to be a native port are typically fan-made mods based on the engine of Tekken 6 . Official Tekken Titles on PSP
If you want the most stable official experience, these are the only Tekken titles actually built for the PSP: tekken tag tournament 2 psp iso roms
If a modded PSP ISO isn't going to scratch that itch, don't worry! You can play the authentic, 100% real Tekken Tag Tournament 2 on a handheld device today. Here is how: There is no official version of for the