SIGN IN AND SHARE ON YOUR FORUM! =D
Let's make an example: We're not home. We are at Starbucks, a friend calls us to play MH (via Miiverse, hopefully? :D ).
We can't unfortunately, since the 3DS version does not have online.
But should have it had that, it would have been possible to play together!
And, since the 3DS has a microphone too, why not use a little Voice Chat? :P
As Yuri Araugi, community manager of Capcom, said: "As for the online support, we've announced the Wii U can go online. 3DS has local multiplayer only.
If that's something you really want to see happen, head on to the MH forums and start talking about it there - then I can bring it up the chain with some supporting evidence. =)"
And so, here we are! Are we enough for you, Mr. Yuri...? =)
Here are the original interview link: http://www.capcom-unity.com/ask_capcom/go/thread/view/7371/29377819/can-you-confirm-or-deny-if-mh3u-on-3ds-will-have-online-and-will-there-be-a-cross-buy-promotion