So guys here are the version exclusives for Black and White..
Pokemon Black Version Exclusives
Weedle, Kakuna, Beedrill
Murkrow, Honchkrow
Houndour, Houndoom
Shroomish, Breloom
Plusle
Gothita, Gothorita, Gothitelle
Vullaby, Mandibuzz
Tornadus
Reshiram
Pokemon White Version Exclusives
Caterpie, Metapod, Butterfree
Paras, Parasect
Misdreavus, Mismagius
Poochyena, Mightyena
Minun
Solosis, Duosion, Reuniclus
Rufflet, Braviary
Thundurus
Zekrom
Pokemon Black Version Exclusives
Weedle, Kakuna, Beedrill
Murkrow, Honchkrow
Houndour, Houndoom
Shroomish, Breloom
Plusle
Gothita, Gothorita, Gothitelle
Vullaby, Mandibuzz
Tornadus
Reshiram
Pokemon White Version Exclusives
Caterpie, Metapod, Butterfree
Paras, Parasect
Misdreavus, Mismagius
Poochyena, Mightyena
Minun
Solosis, Duosion, Reuniclus
Rufflet, Braviary
Thundurus
Zekrom