AetherSX2 or NetX2 (High-performance mobile PS2 emulators). Step-by-Step Setup Guide 1. Acquire the Prerequisites
Because the game is so loved, the modding community has worked hard to "port" the PS2 version into a format that the PPSSPP emulator can read. This is likely the file you are looking for when searching for a download.
First, you need the emulator itself.