Hello, i am a super mario bros speedrunner and i'm looking to play this, can someone link me to a good emulator as well as a VS SMB ROM and instructions as to how to set it up, i tried myself but can't figure it out, thanks :)

Fceu or Nestopia are very good options for this game, I recommend setting up a key for "insert coin" in either of those so every time you reset you don't need to use the mouse to insert a coin before you can play. this is not like lost levels or any FDS games where you have to download a BIOS and set it up. as for the ROM you can probably just google it shouldn't be hard to find