[Tiva]

Pokémon fans, get excited for two incredible new adventures! Announcing Pokémon Black Version 2 and Pokémon White Version 2, coming to the Nintendo DS™ family of systems this fall. The games can also be played in 2D on the Nintendo 3DS™ system.


Official pokemon website says it won't be in 3D.

Also they never change platforms over a game span it is a way to make sure those who but the first title buy the second release title.