User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-67.10.80.10-20111227223458/@comment-152.132.9.129-20111228142656

DS games from all regions can be played on the 3DS however 3DS games are region spacific, meaning you have to have a 3DS from the same region as the game to play it. This however does not apply to multiplayer games that use single gart download play or if you are playing multiplayer with multi carts on most games. Meaning, if you are from EU and I am from US we can still play most (or at least all the 3DS games I own) that allow local and online multiplayer together. Also if you have a EU or other region 3DS and I have a US 3DS and you want to play starfox or another single cart share game with me you can. This also works for tiles that are the same game but have different names such as "SwapNote" in the US and "LetterBox" in the EU. So it is VERY likely 2 people with two different region copies of MH3G may still be able to play multiplayer together... Though we will not know for sure until the game is actually released in other regions... If it is.