Crystal is one of the best of the franchise, altough the patched ROM with all the Pokémon being obtainable ingame makes it a 100% perfect game. You battle aroun

Crystal is one of the best of the franchise, altough the patched ROM with all the Pokémon being obtainable ingame makes it a 100% perfect game. You battle around a new story, you fight your past self from the previous games; and, on top of that, you can fight at the battle tower with any style you would like. You can recompile it with rgbds, for sure there is a decompiled ROM with the 251 modification at lots of repos.