I'm interested in possibly learning MZM for the upcoming 12 hour challenge that Go1den is putting on (http://pastebin.com/8Dqc1U7W). But I know that gameboy advance emulation has a reputation for being very inaccurate. Are there any emulators that are preferred over others? And would the run I do be considered legitimate if I were to submit it here?

Edit: Also, is the beginner tutorial in the "Guides" section still up to date? I just noticed that it's 2 years old.