Right now, the sprite you are viewing comes from Pokémon Diamond, Pearl, and Platinum Versions. Weezing can be found in these games on Sinnoh Route 227 and at Stark Mountain. Its pre-evolution, Koffing, can also be found here, but only in Platinum.
nothing can stand in your way</big>
there will not be Black and White sequels for ds pokemon gray will be for 3ds