Psp For example? Thank you, I really wanted to make a speedrun , But thank you, but in all Lego speedruns you can't use an emulator?

You can play and submit runs on the PSP (the console itself), but you cannot submit runs done on emulators.

U can use a PlayStation disc on a PSP, idk about emulators on PSP. I know for a fact that it is banned to use emulators on pc tho.

so you can't submit runs that will be runned on normal PSP?

You can; you can’t use an emulator on the PSP, only the disc/cartridge that was sold in major retail for the PSP. normal PSP is accepted