Talk about the Festival Plaza, and do some shit that isn't covered in the wifi general like missions or facilities. FAQ will be better organised eventually.

>how to gain fc fast?
Type-matchup test is the only mission that seems to be worth it. 16 solo points nets you 5 stars and 25 FC, and somewhere above 325 total points gets you another 5 stars.

>what colors are exclusive?
Sun clothing - red, orange, yellow, pink, beige
Sun dye houses - red, orange, green, purple
Moon clothing - green, blue, navy blue, purple, grey
Moon dye houses - yellow, blue, navy blue, pink
Some clothes have exceptions - for example several beige clothes are Sun-exclusive while several are Moon-exclusive.
Full pastebin list of game-exclusive facilities and clothes coming soon, resort to Serebii for the moment.

>how to gain the things exclusive to the other version, or just gain things in ways not named sophocles?
Buying facilities off other players becomes available at rank 8, buying clothes off other players of the same sex becomes available at rank 10. The facility offered is the one in the first slot, and the clothes offered are a random one the other player is wearing.

>how to dye?
Only white clothes can be dyed.
The tones are unlocked in this tier order - pastel, dark, bright.
Berries can be used to dye clothes colors the house doesn't focus on, but they aren't worth it due to various reasons including expensiveness and Poni-exclusive berries.
A five star dye house might not dye clothes bright colors with berries, instead only pastel and dark. Waiting for confirmation.

More OP info to be added whenever this shit gets organised better.