Hey, I’m sorry if this is a dumb question, but I’m new here, I’ve started speedrunning this game, and I would like to post some of my runs. However, I use Mesen, and I’m not sure if that’s allowed. Additionally, I haven’t been able to set up recording so that both livesplit and the game window is captured, so is it acceptable to just submit the run and a retimed time in the description? Or if it isn’t, is there a way to capture the game window and livesplit? Any help would be greatly appreciated.

Also, can I time the game in post, or does it have to be live?

Messen is one of the most accurate emulators, so it's definitely allowed. However, you need to make sure and check every game's rules, cause in rare cases it was banned (e.g. Super Mario Bros.). Checking rules is the first recommended step anyway before starting any attempts , for instance it's clearly stated in Donkey Kong's rules, that Messen is allowed.

As for timing, there is no requirement to time your runs live and show it on the video footage, however it's recommended if possible. Recording livesplit and emulator at the same time isn't that hard with the help of some basic tutorial, if you are utilizing some broadcaster software (like free and one of most popular: OBS/OBS Studio). One more important remark: DON'T record via some options inside emulator. Submitting emulator movie is usually not acceptable, since it's very easy to cheat with it and impossible to notice it (like skipping the usage of save states).

Thank you so much! I figured out how to do everything, and now, I can submit runs!

hirexen, you da best!