Ahh I was needing a thread like this.

I saw in the demo that changing skin color for CASTs costs something like 500,000 meseta. Does that include the main and sub colors of the parts? If not, can it be done some other way?

How do I know if I have photo drops, photon crystals, and photon boosters?
Not sure if this is what you're asking, but:
Photon Drop = フォトンドロップ
Photon Crystal = フォトンクリスタル
Photon Booster = フォトンブースター

I'd translate the exchange list but someone probably already has, somewhere...