Pokémon Family Species: Gen I (Bulbasaur to Parasect / Venonat to Cloyster / Gastly to Miltank / Magikarp to Mew) | Gen II | Gen III (Treecko to Sharpedo / Wailmer to Deoxys) | Gen IV | Gen V (Victini to Zoroark / Minccino to Genesect) | Gen VI (Chespin to Hawlucha / Dedenne to Volcanion) | Gen VII (Rowlet to Comfey / Oranguru to Melmetal / Ultra Beasts) | Gen VIII (Grookey to Hatterene / Impidimp to Calyrex) | Glitches
Pokémon Human Characters: Protagonists And Rivals (Kanto / Johto / Hoenn / Sinnoh / Unova / Kalos / Alola / Galar) | Professors | Gym Leaders (Kanto / Johto / Hoenn / Sinnoh / Unova / Kalos / Galar) | Trial Captains and Kahunas | Elite Four | Champions
Pokémon Villain Teams: Team Rocket / Team Aqua/Magma / Team Galactic / Team Plasma / Team Flare / Team Skull / Team Yell
Frontier Brains And Other Facility Heads | Trainer Classes | Other NPCs (Aether Foundation / Ultra Recon Squad / Macro Cosmos)
A list of Pokémon who debuted in Pokémon Black and White. At 156 new Pokémon, none of which are related to previous ones, this generation has introduced the most Pokémon of them all. Due to no old Pokémon being present in the story of Black and White, many Pokémon present in previous games—such as Zubat, Geodude, Tentacool, or Machop — got expies for this one. In addition, many of the Pokémon here evolve at later levels than most Pokémon from other regions. As a tradeoff, many of them have comparatively stronger (or more specialized) stats, but shallower movepools. As for Legendary Pokémon, these games introduce the now-standard version mascot trio and obligatory regional trio, but eschews the sort of miscellaneous non-event Legendaries seen in the fourth generation in favor of a third trio—a pair of version-exclusive roamers and their leader — and is the second consecutive generation to include four event Legendaries. However, no Pokémon from this generation received Mega Evolutions until Omega Ruby and Alpha Sapphire and even then, only Audino received one.
For other generations, go here.