I'm still on the fence as to whether these should be DS or 3DS. I mean, from my own point of view I would have preferred a 3DS game since it would have looked amazing even if you don't play with the 3D effect on. It could also have potential to interact with Pokedex 3D. For example, you could encounter a pokemon in the main games which would cause it to appear in Pokedex 3D. On the other hand, I can see some people are still choosing not to buy the 3DS for whatever reason, so it is safer to make them DS. Plus, the developers weren't exactly going to make 3DS pokemon games to be released in June and then say "you have 4 months to buy the console before the games get released".