I would like to speedrun this game, but I don't have an NES console currently. I do have a Retron 3 for NES, SNES, and genesis and I was wondering if I could use that, or if I need to just emulate it for now?

So I asked a couple people and did some looking at it online. From what I can tell it looks like Retron 3 uses a nonstandard nes emulator in it. Looks like just using a emulator like FCEUX 2.2.0 or Bizhawk would be your best bet.