Note: I cannot provide links to download copyrighted games. You must dump your own legally owned PSP discs, or find the files on your own. However, the files you are looking for are usually named:
: On the title screen, holding certain buttons (like B and Y on Switch) while pressing Start allows you to enter a hidden Stage Select menu. From there, you can enable Debug Mode Sonic Mania Ppsspp Download Android
In that case, buy the game on Nintendo Switch, PS4, or PC, then stream it to your phone. Or support Sega by buying an official mobile Sonic title. Note: I cannot provide links to download copyrighted games