Mario Kart 8 Deluxe is a first-party title developed by Nintendo and is exclusively available on the Nintendo Switch

Scams or Malware: Downloads that may harm your computer or handheld device.

The reason lies in the hardware specifications. Mario Kart 8 Deluxe was built specifically for the Nintendo Switch (and previously the Wii U). It utilizes a modern graphics engine, high-resolution textures, and complex lighting systems that require significant processing power.

The Hardware Reality: Why It Doesn't Exist

To put it bluntly: There is no legitimate port of Mario Kart 8 Deluxe for the PlayStation Portable.