The term "Enhanced" likely refers to the enhancements made to the game compared to the original versions, such as new storylines, additional Pokémon, and gameplay mechanics.
Pokémon Black Version 2 and its counterpart, Pokémon White Version 2, are role-playing games developed by Game Freak and published by Nintendo for the Nintendo DS. They were released in 2012 in Japan and in 2013 for North America and Europe. These games are sequels to the original Pokémon Black and White versions. Pokemon - Black Version 2 -usa Europe- -ndsi Enhanced-.nds