If you want to play Tekken on the go, here are the legitimate ways to do it:
Verdict: A Technical Impossibility and a Digital Trap
If you are searching for a "Tekken 7 PSP ISO," it is important to understand exactly what you are looking for. This review covers the game Tekken 7, the hardware limitations of the PlayStation Portable (PSP), and the risks associated with downloading files claiming to be this combination.
This is where the "Tekken 7 PSP" claim falls apart. The PlayStation Portable (PSP) was a legendary handheld for its time (2004–2014), but it simply does not possess the hardware required to run Tekken 7.
Authors: Aaron Perzanowski & Michael J. McGonigal
Published in: Harvard Journal of Law & Technology, 2015
Link: https://jolt.law.harvard.edu/articles/pdf/v28/06_Perzanowski.pdf
Key points
If you own a PS4, PS4 Pro, or PS5, you can use Remote Play on a PlayStation Vita (PS Vita) or a smartphone. This streams the actual Tekken 7 from your console to your handheld screen. The Vita is the true successor to the PSP for this purpose.