Friend codes change every half hour.
In July, it was discovered Final Fantasy: Crystal Chronicles Remastered Edition wouldn’t support offline or local multiplayer due to “development reasons“. A few weeks later, the director of the game, Ryoma Araki, further explained how it was a “one or the other” kind of situation and local play, instead of cross-play, would have restricted the experience.
If you’re wondering at this point how you’ll connect with other players online, according to a translation by Robert Sephazon, it’ll be powered by friend codes that change every half hour. This is apparently “necessary” due to the multi-platform design:
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