Wait, the user specifically asked for a "post regarding" which might be for a blog or forum. They might want to create content about the ROM. In that case, I should advise against including direct links to ROMs and instead suggest discussing the game, its features, reviews, or legal ways to access it.

Monster Hunter XX was released on the 3DS in Japan, but I don't recall a specific version called "Double Cross." Maybe it's a fan translation or a mod? However, official releases don't have that variant. The user might be confused or there's a misunderstanding.

Also, maybe the user is interested in the game but in a region where it's not distributed. I can mention that they can check if the game is available on digital marketplaces, or contact the publisher for region-specific information.

Also, I should consider the user's intent. They might be a fan of the game looking to play it if it's not available in their region. Alternatively, they might want a fan-made game or a translation. Either way, distributing copyrighted material without permission is not permissible.