Rhythm talk:Stones

What's the preferred romanization of ラックストーン? I saw here that "Rack Stone(s)" was used, but I had previously encountered "Luck Stone(s)". I've seen "lucky" represented as "らっき" before, so that leads me to lean towards the second romanization. Are there any official sources that list it as one or the other? 7thspacevelocity (talk) 07:23, 5 January 2016 (EST)

I think Luck Stone is the correct one *was drunk when writing the solicitation page (probably...)*. ingame store only refer it as "stone" Arkeido (talk) 07:27, 5 January 2016 (EST)