Ghetsis will combine the power of Kyurem with the power of the legendary dragon befriended by his son two years earlier and force Kyurem to fuse with Zekrom B2 or Reshiram W2. The player must defeat Team Plasma including its new leader Ghetsis to free Kyurem. The plot comes to a head when Zinzolin freezes Opelucid City in ice with a combination of technology and the legendary dragon Kyurem, which Team Plasma has captured. One of the Seven Sages, Zinzolin, appears in an antagonistic role, yet former sage Rood will help the player. Over the course of their journey, the player and Hugh will have numerous encounters with both current and former members of Team Plasma, as well as the mysterious scientist Colress. Though filling the traditional rival role, Hugh is not pursuing the Pokémon League challenge: it is revealed that he is trying to recover a stolen Pokémon from Team Plasma, who were not disbanded two years prior as expected. A boy from the player's hometown, Hugh, will travel with the player at certain times. After receiving their first Pokémon from Professor Juniper's assistant Bianca, they are encouraged to battle in Pokémon Gyms and aim for the Pokémon League. The player-named, by default, Nate if male or Rosa if female-begins in the southwestern city Aspertia City. Three new Gym Leaders and a new Champion are introduced, while the Unova Pokédex is expanded to include Pokémon that are foreign to the region, much like in Pokémon Platinum. Many changes have taken place in Unova over this period: new locations are accessible in the southwest and northeast of the region, and some previously existing locations cannot be visited or are restricted until later in the game. Pokémon Black and White 2 takes place two years after the events of Pokémon Black and White.

Pokémon.com (Black 2) (White 2) Official site

Nintendo DS (enhanced for the Nintendo DSi) Pokémon White Version 2's boxart, featuring White Kyurem Pokémon Black Version 2's boxart, featuring Black Kyurem Pokémon Brilliant Diamond and Shining Pearl.

Pokemon black 2 and white 2 rom