Right now, the sprite you are viewing comes from Pokémon Silver Version. Weezing cannot be found in the wild in this game, but its pre-evolution, Koffing, can, and is available in the Burned Tower. Koffing is also available in limited quantity in the Team Rocket HQ in Mahogany Town.
nothing can stand in your way</big>
there will not be Black and White sequels for ds pokemon gray will be for 3ds