While standard DS games are region-free, DSi Enhanced games like are generally region-locked when played on DSi or 3DS systems. However, Western releases (USA/Europe) are often compatible across non-Japanese regions, and they remain entirely region-free if played on an original DS or DS Lite.
When played on a DSi or 3DS, you gain access to specific hardware-based upgrades: pokemon black version 2 usa europe ndsi enhancednds
When played on a , DSi XL , 3DS , or 2DS , the game unlocks the following technical enhancements: While standard DS games are region-free, DSi Enhanced