The legendary weather Pokemon - Tornadus, Thundurus and Landorus - will receive new forms in Pokemon Black 2 & Pokemon White 2. It has been revealed that their original forms from Black & White 1 are called Keshin Formes
, while the new forms are known as Reijuu Formes. These translate as Sacred Forme and Incarnate Formes respectively (final English names to be announced).

Incarnate Formes of Tornadus, Thundurus and Landorus
Tornadus' new form focuses on Defense, Special Defense and Speed. Thundurus' new form focuses on Special Attack. Landorus' new form focuses on Attack. We'll post more details as we get them.
The forms are not obtainable in-game but rather through a new application to be released on the 3DS, called AR Searcher
(more about that in the next post).