PSP games utilize a specific decryption method. If the ISO is a "rip" (a compressed version where music or cutscenes are removed to save space) or if the settings aren't optimized, the game will crash.
Where the PSP version shines is its exclusive content. Capcom added a “Training Challenge” mode tailored for short bursts of play, a gallery mode packed with concept art, and—most importantly—ad-hoc multiplayer. Before the Switch era, this was the only way to take the crossover on the go and link up with a friend for real-time battles. street fighter x tekken psp iso work