Here's a more detailed look at what a hypothetical Mario Kart 64 PSP remake could entail:
To play Mario Kart 64 on a PSP, you typically rely on emulation or fan-made homebrew versions: New MARIO KART 64 port to the Sega Dreamcast by JNMARTIN mario kart 64 psp new
For the best analog steering, go to PSP Settings > External Controller > Analog Stick Sensitivity and set it to "High." Here's a more detailed look at what a