>>18930221If you are playing green for some reason you can switch Pokemon while still using your main Pokemon for the battle while the "switched" Pokemon get all of the exp. As a slight bonus the "switched" Pokemon will now have the HP of your main Pokemon temporary until you lose it all or use a Pokemon Center.
Currently doing a glitched Nuzlocke run for the hell of it and see what "God Pokes" or Gltichmons I can get.