The difference between Sharpedo and Garchomp, Luvdics and Alomola, Pachirisu and Emolga, etc. and Diancie and Carbink are being introduced in the same gen, so thought was likely given to that decision. Now, there's nothing to say they're not still unconnected, but I bet they will have some connection, although it may not be as strong as an evolution or Phione situation, maybe just the Diancie area will be filled with Carbinks. Who knows?
My DWF: Houndour, Lickitung, Torkoal, Vulpix, Jynx, Tangela, Kanghaskan, Riolu, Mr. Mime, Eevee, Ralts, Abra, Sabeleye, Swablu, Nuzleaf, Crawdaunt
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Friend Safari: Electric (Stunfisk, Emolga, Galvantula)
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