They are sequels to the earlier Generation V. Since these Pokmon cant be found in Black 2 and White 2, these two weather effects go unused. Also, Black/White was strictly only Generation 5 Pokemon, while Black 2/White 2 had a mix of all five generations of Pokemon littered throughout the games. Advertisement: Pokmon Black 2 and Pokmon White 2 are Generation V Pokmon games for the Nintendo DS. If you'd like to discuss more Pokemon related stuff, visit IGN's Pokemon Board. Every time Thundurus or Tornadus appears, a rainstorm starts. The game will feature a brand new storyline, with new Protagonists (a new girl and a new boy, whom players can decide between at the game's outset), a new Rival, new Gyms and Gym Leaders, new Dream World funcionality, and new Pokemon forms (including Black Kyurem and White Kyurem - on display in the box art). The land has undergone significant changes in that time, including most of the map mysteriously being covered in ice. several significant differences between the two games in terms of storyline, locations, and available Pokemon.
Pokemon Black Version 2 and White Version 2 are set in the Unova region, two years after the events of Black and White. Looking for the Pokemon X and Y Wiki Guide?