Confirmed: Event Pokémon are Region-Locked!


Nintendo 3DS Developer
You might have known this feature in Diamond, Pearl, Platina, Heart Gold, Soul Silver, Black, and White Versions of Pokémon: Download a Pokémon or item that activate an Event in a game.
The 13th Movie distributed an Alternative Coloured Raikou, Entei, Suicune and Celebi in Japan.
It currently happens in Gamestop in the USA.
However, I don't have access to any of these countries, so a ROM of this distribution leaked on the internet.

I was wondering I could download one of them to my American Pearl, trade with my Japanese Heart Gold, and transfer it to my Japanese Black.
But unfortunately, it failed, because the Raikou is not "compatible with the game".
This means, the Event Pokémon are Region-Locked.
Mystery: Alternatively Confirmed!