I certainly hope they don't make any main series pokemon games for 3DS. They've already started fifth gen on DS, so it's likely to stay that way.
You can hope this all you like, but it's simply not true. The fact of the matter is that Nintendo's first- and second-party support for the DS family (original/Lite/i/XL) is, right now, dwindling to the merest of trickles. All of their major franchises - Mario, Zelda, Star Fox, etc. - have begun the migration to the 3DS. And yet you believe that nearly a year from now, they're going to take a core Pokémon title - a game nearly guaranteed to sell not only many millions of units, but hardware with it - and release it for hardware that will by then be over a year and a half defunct?
With that out of the way, I think people aren't reading the original poster's question quite closely enough. He's not asking about games, he's asking about the actual hardware, a 3DS with some sort of Pokémon design stamped on it.
To answer that question, original poster, the answer is no, nothing yet. Rumble Blast is the franchise's first real presence on the hardware, and as fun as that game is, I imagine you understand it's not the sort of game for which they normally release a special edition hardware.
The best answer is to start looking again once the inevitable third Unova title is announced (next May or thereabouts, if they release it next year) and then released (next fall, if they release it next year) in Japan, as that would be their next big thing with which to attach a limited edition 3DS hardware.
Check back then if that's what you're waiting for; if they go that route, you could expect to see that hardware internationally when that third game releases. The punchline to all this is that if any such hardware is coming, it is not coming particularly soon.
