Diancie probably wouldn't get through anyway.
PokeBank can detect hacked Pokemon, like it does on the GTS. If the Diancie is obviously hacked (for example, illegals moves, stats, location of capture) then it will not get through. So there's no need anyway.
If it does happen to get through, then Sir Mudkip is right, it shouldn't be a problem. Congratz on getting it through x3
Hope I helped. :)