The most "interesting" feature of the is not something added by the developers at Bandai Namco, but rather a clever reverse-engineering hack that saved the game for players with custom firmware.
Despite being a handheld port, Tekken 6 for the PSP preserves the core "Iron Fist" experience from the PS3 and Xbox 360 versions. tekken 6 usafixiso psp
Disclaimer: This guide is for educational purposes. You should own a legal copy of Tekken 6 before downloading any backup ISO. Tekken 6 USA FIX ISO (specifically the "Liightsout"