NPD Group has revealed the top selling Video Game titles in the United States from September 30th until October 27th. Pokémon Black 2 and White 2 was released in North America on October 7th, 2012. From October 7th, 2012 until October 27th, 2012, Pokémon Black 2 and White 2 sold a combined total of just over 865,000 units. This is less than half of the sales that Pokémon Black and White had in the same time period which sold over 2 million combined copies. Below are the top 5 selling games for October 2012.

Top Selling Games - September 30th until October 27th

1. NBA 2K13 (360, PS3, Wii, PSP, PC)
2. Resident Evil 6 (360, PS3)
3. Pokémon Black Version 2 (NDS)
4. Dishonored (360, PS3, PC)
5. Pokémon White Version 2 (NDS)

Source: NPD Group

I can understand why Nintendo/GameFreak wanted to release the sequels on the Nintendo DS as the userbase is still 10x more than the Nintendo 3DS's userbase. Nintendo's problem once again is their refusal to do worldwide launches of the Pokemon games. Fan translations of the games were out 2 weeks after the games were released in Japan, so with the prevalence of flash carts and emulators, English speaking people could easily play the game months ahead of the official releases. If fans can do the turn around that quickly, you've think the developers could do so as well. Worldwide marketing at the same time would have helped sales.