Do you want to see what -2 look like on the cartridge version of the original, the original problem is you can enter the ending pipe but the problem it loop at the begining of -1 so with the game genie code pipe bring you to random place and only turn it on just before the ending pipe, also save state just in-case it does not bring you to a valid flag pole. Even after you see minus 2 keep watching after for bonus content, and the proof of concept that any world can be a bonus room. I was playing it on NES all-stars version on my lap top. that is why lakitu behave like super mario bros.3 since it was just a patch for Super mario bros.3 /watch?v=fwEPFmHcj10