If you're looking for information on how to play Mario Kart 64, you might consider:
Fifteen years later, a YouTuber known for restoring old handhelds buys a “junk” PSP from a flea market in Osaka. Inside the UMD drive: nothing. But under the battery, a folded piece of paper with a command line. And on the memory stick, a single encrypted file named “MK64PSP.bin.” Mario Kart 64 Psp
He called it Mario Kart 64: Shindou Pack — PSP Edition , a private build that required a custom firmware and a specific memory stick speed to avoid stuttering. He never intended to release it. If you're looking for information on how to