Soundwave on 21 September 2012
The DS/3DS are the market leading platforms for Japan.
Monster Hunter is the biggest (second biggest?) franchise in Japan.
The 3DS can run adequete enough graphics to now handle Monster Hunter whereas the DS could not.
Why shouldn't Monster Hunter 3/4 be on 3DS is a better question. PSP was lucky to have it for a few years only because the DS couldn't run the engine.
