http://www.filb.de/1419
According to this article, certain in-game trades "unlock" Korean Pokedex entries for unrelated Pokemon.
When you trade a Ditto for Rotom you "unlock" Froslass' Korean entry.
Likewise, when you trade a Chirachiino for Munchlax you "unlock" Garchomp's Korean entry.
I have done the second trade, and can confirm it to be true.
What this means is that Korean 5th gen games will most likely finally be compatible with other regions' games.
According to this article, certain in-game trades "unlock" Korean Pokedex entries for unrelated Pokemon.
When you trade a Ditto for Rotom you "unlock" Froslass' Korean entry.
Likewise, when you trade a Chirachiino for Munchlax you "unlock" Garchomp's Korean entry.
I have done the second trade, and can confirm it to be true.
What this means is that Korean 5th gen games will most likely finally be compatible with other regions' games.