Since you cannot find a "native" CIA for a DS game, here are the standard ways to get it running:
To play this game on a modded 3DS, you typically use one of two main methods: a or TWiLight Menu++ . The Difference Between CIA and NDS Files pokemon white 2 cia file
Multiplayer (Download Play) doesn't work. Solution: Genuine DS games have spotty Download Play support via CFW. For trading between two White 2 CIA files on two different modded 3DS systems, use the IR or wireless features inside the Pokémon Center—this usually works fine. Download Play for minigames is unreliable. Since you cannot find a "native" CIA for
Installing the Pokémon White 2 CIA file is a relatively straightforward process: pokemon white 2 cia file