I know we can trade eggs between HG/SS and D,P,Pl.
So, is it possible in this new gen. too?
'Cause if not, my plans for my party are over... XD
Yes, you can trade eggs between games of the same generation (you can't migrate eggs though, e.g. from Platinum to B/W).
Although of course you could just hatch the egg on the first game and trade the baby Pokemon...