Hi there! I have two questions.

1 - Which emulators are allowed for runs?

2 - Are there any guides or tutorials for the run?

From what I remember after DMing someone on discord, pretty much any emulator is allowed as long as it's somewhat accurate. Also I don't believe there's any guides or tutorials for this run as it's very long, but I vaguely some runs having some insightful commentary.

Idk about guides but I made some videos back in the day of some strategies. You can check my YT channel I guess:
https://www.youtube.com/@abcdefghilihgfedcba/search?query=advance%20wars%202

For example I have a video of Factory Blues in 2′41″ which you might find useful idk.