Chocobo's Crystal Tower. That sounds cute. It also sounds dungeon crawler-y. That's fine by me, as I love dungeons that are mysterious.
Of course, I'm just guessing. This is only a trademark. We're guessing its a new game. Square Enix filed a trademark for Chocobo's Crystal Tower in Europe, and Siliconera points out that the title doesn't seem to have a Japanese counterpart, like they usually do.
We're also with Siliconera in that this sounds like it could be an iPhone game. Again, only guessing. Maybe it's a 3DS title.
While we're at it, where's my new Chocobo racing game?