Tekken? Nah. It’s a four button game, and you only need to map the shoulder buttons if your character has a good move with a weird button combination like Square+Circle. Street Fighter Alpha 3 really needs all 6 buttons, though.
You might want to search for a RetroAchievements collection of PlayStation Portable games.
To take the survey, go to this campaign page and scroll down to the “take part” button to get the survey in your language. I basically just told them that I install Firefox ESR from Chocolatey. They were really interested in locale strings like “en-US”.