To understand why "Tekken 8 on PPSSPP" is a technical impossibility, one must understand the sheer disparity between the hardware the game was built for and the hardware the emulator simulates.
You have two legitimate ways to play Tekken 8 on a portable device right now: Tekken-8-PPSSPP-Zip
This is the pinnacle of Tekken on the PSP. It features: To understand why "Tekken 8 on PPSSPP" is
The PlayStation Portable (PSP) was a marvel of 2004 engineering, boasting 32MB of RAM and a MIPS architecture processor. The PPSSPP emulator works by faithfully translating these MIPS instructions into code that modern phones and PCs can understand. The PPSSPP emulator works by faithfully translating these
Tekken 8, conversely, is built on Unreal Engine 5. It leverages modern x86-64 architecture, ray-tracing hardware, and requires a minimum of 16GB of RAM—500 times the memory of the PSP. To run Tekken 8 on a PSP emulator would be akin to trying to stream a 4K movie on a pocket calculator. The instructions, assets, and physics engines are simply incompatible. There is no "zip" file that can compress a PS5/PC game into a PSP ROM format.
Since you are searching for a "Zip" file, you need an extraction tool.