Does anyone know if an emulated version of SMB2 is 100% accurate with load times, frame rates, and everything else?

Which emulator should I use and who should I contact to get a ROM of it?

I just saw the World Record run and it looked super fun to run and would like to learn the game.

You can click the "view rules" button to see what emulators are allowed. Don't ask how or where to get a ROM on the forums.