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Final Fantasy Crystal Chronicles: Remastered Edition piles friend codes on top of friend codes for online play
Final Fantasy Crystal Chronicles: Remastered Edition adds online play to the classic experience, complete with cross-play on PS4/mobile. That means there's all kinds of people meeting/matching up online, and Square-Enix has gone with a rather interesting system to keep everyone together.
The screenshot of the game above indicates that not only will Final Fantasy Crystal Chronicles: Remastered Edition utilize friend codes for players, but it will also have a separate 6-digit friend code. These codes seem to pertain to your party number, which can be search/joined by other players. Furthermore, these numbers only last for 30 minutes, when a new 6-digit number will be distributed.
Seems a bit convoluted, especially when there are other cross-platform games out there that handle online play without nearly as much hassle. Hopefully the system is a bit easier to use than it seems.