@Fifth: Some little advice to your great guide ... there are some 'mistakes' in your guide on the key combo section that were on the last page.
for GBA games there is a 3rd key combo:
return 2 Supercard menu: L+R+SELECT+START
and the NDS key combo for returning to the Supercard menu doesn't need the SELECT button, it's only that one:
return 2 Supercard menu: L+R+A+B+X+Y