I'm pretty sure DeSmuME is the the only emu thats allowed. According to Walrus, "there's a setting in DeSmuME called 'Bus-Level Timing' that you need to turn off for the overworlds not to be super laggy." Personally I would recommend running on your DSi, if you join the discord we can help you find a good way to record with a phone/camera or something. If you do end up running on emu, that setting should help. Gl with your runs either way!

The recording doesn't have to look perfect, as long as the mods can see what is happening it'll be fine, so don't stress out about the quality.