Hm...well, I think that the Blue, Red, and Green Potions should somehow be tied to Healing Items. For instance, since in the games the Blue Potion restores magic, you could make Blue Potion and Potent Blue Potion replace Elixir and Max Elixir respectively. Green restores magic and health, but since there's no equivalent, I think that would make for a good max restore. And Red just heals, so...one of the healing items that isn't a heart, maybe?
As for the whole Crystal to Orb thing, that would be better for naming and make spriting easier. Well, unless you're dead set on that, I was also thinking Gem might work, since they're also from the Earth so it'd work with the whole plot idea set around them, as well as having three letters.
