: Files claiming to be "PSP downloads" for this game are often scams or malware designed to exploit users looking for unauthorized versions.

If you want the Mario Kart experience on your PSP without the risk of suspicious "upd" downloads, these official titles are your best bet:

) that infect devices with viruses instead of providing a game file. Legitimate Mario Kart Alternatives for PSP

In conclusion, it is not possible to download Mario Kart 8 Deluxe on PSP. The game is exclusively available for the Nintendo Switch, and there are no plans to release it on PSP or any other PlayStation console. However, there are alternative kart racing games available on PSP that offer similar gameplay to Mario Kart. If you want to play Mario Kart 8 Deluxe, you'll need to purchase a Nintendo Switch console.